first and foremost . as the first and principal thing首先；最主要的是
Our experiments are in conformity with the physical law，first and foremost with the Theory of Relativity．我们的实验是符合自然法则的，首先是符合相对论。
First and foremost，we have to consider the morality of the enterprise．首先，我们应当考虑企业的道德问题。
He who would be a good student must，first and foremost， study hard．想当好学生，先要努力学
First and foremost， the refugees needed food．最重要的是，难民们需要食物。
first and last . all the time始终；一直
She was first and last a school teacher．她一直是名教师。
first and last . most noticeably；chiefly主要地；总的说来
He joined the army because first and last he wanted to help his country．他参军的目的主要是为了报效祖国。
first and last . totally总共
First and last， that boy's education has cost four thousand dollars．那孩子的教育费用总共已花了四千美元。
first of all . before anything else首先
One will be judged by one's speech first of all．首先，察其言而知其人。
If you want to speak good English， you should first of all listen to good English as often as possible．如果想英语说得好，首先应当尽可能地经常听好的英语。
First of all，let's read the new words．首先，让我们读生词。
first or last . at one time or another迟早
You may as well do this now，for you will have to do it first or last．这件事你最好现在做，因为迟早你总得做。
You may do it first or last；I'm sure he doesn't care as long as you do it ．那件事你早做迟做都可以；我相信，只要你做，他是不会在乎早晚的。
first or last 迟早
He will marry the girl first or last. 他迟早都会和那个女孩结婚。
We'll achieve our objective first or last. 我们迟早会达到目的。
fish for . try to get or to find out something by hinting or in a roundabout way寻找；刺探；转弯抹角地得到
Despite his pleasant manners， I suspected he was fishing for in formation about the decision made at the Board meeting．尽管他态度愉快，我怀疑他在探听董事会上所做的决定。
Don't be taken in by his charm；he's fishing for an invitation to the big party．不要被他的花言巧语所骗，他无非是想捞取盛大宴会的请贴。
He is always fishing for compliments．他总是想让别人恭维他。
fish for . search for；search for underwater搜寻
He is fishing for pearls．他正在采集珍珠。
fish out . bring out like a fish打捞
The girl fell into the river and the soldier fished her out．女孩掉进河里时，那位战士把她救上来了。
This river is in danger of being fished out．这河里的鱼有被捕光的危险。
fish out . bring out； draw or pull out掏出；拉出
The poor old man fished out several coins from his pocket．那个可怜的老人从口袋里掏出几个硬币。
She fished out a bunch of keys from her handbag．她从手提包里掏出一串钥匙来。
Fishing out his pipe，he filled it and puffed at it without a word．他掏出烟斗，装满烟丝，一言不发地抽了起来。
fish out of water . A person who is out of his proper place in life； someone who doesn't fit in如鱼离水；感到生疏；不自在
She was the only girl at the party not in a formal dress and she felt like a fish out of water．她在晚会上是唯一没有穿礼服的女孩，因此觉得很不自在。
A new boy feels like a fish out of water when he first goes to school．新学童初上学时，总是感到很不习惯。
When he was away from his colleagues， he felt like a fish out of water．离开了他的同事们，他感到如鱼离水一样，感到生疏。
fit as a fiddle . in very good health十分健康；精力旺盛
The old man is more than eighty years old but fit as a fiddle．这位老人已经八十多岁了，但仍身体健康，精神很好。
Professor Li rested at home for a few weeks after his operation；now he is fit as a fiddle．李教授手术后在家休息了几周，现在他精神很好。
fit for . suited for对…合适的；有资格胜任
Such a boat is fit only for a calm sea．这种船只适于在风平浪静的海上航行。
This meal is not fit for me．这种饭不适合我吃。
He is in poor health；he is not fit for heavy work．他身体不好，不适合做重活。
What kind of work are you fit for？你适合做哪种工作？
fit in . find space for something 安排（地方）；放进；为某物腾出空间
There was so much furniture in the room that it became impossible to fit any more in．这个房间放了那么多家俱，不能再放进什么东西了。
Somehow she managed to fit everything in the suitcase．她设法把全部东西都装入箱子。
Can you manage to fit this small table in somewhere？你能设法找个地方放这张小桌子吗？
fit in . find time for somebody 为某人腾出时间
Although I'm very busy， I'll try to fit in a game of tennis at the weekend．尽管我很忙，本周末我打算安排打一场网球。
I hope the hairdresser can fit me in today．我希望理发师今天能给我安排个时间（理发）。
There are still two patients to be fitted in this afternoon．今天下午还有两位病人需要安排治疗。
Our director can't fit in any more visits this week．本周我们主任已再没时间接待来访者了。
fit in . adjust well to one's surroundings；live in harmony适应环境；相处融洽
She doesn't fit in here， I'm afraid．我担心她在这儿不适应。
Brought up in a big city， he found it quite difficult to fit in in the countryside．由于在城市长大，他发现他很难适应农村的环境。
He fitted in well with his room mates．他和同房间的人处得很融洽。