year in，year out . year in and year out . regularly through the years；continuously 年复一年；不断地
In the old society he worked for a landlord year in and year out but he still lived a miserable life．在旧社会他年复一年地给地主干活，但还是过着悲惨的生活。
years old …岁（指年龄）
Her son is three years old. 她儿子三岁了。
He couldn't have been more than fourteen years old. 他不可能超过十四岁。
She was an elfin-like girl who looked barely ten years old. 她是个鬼马小精灵，看起来也就刚满十岁。
years ago 多年前
The couple met about two years ago and soon became firm friends. 这对夫妇大约两年前相遇，很快就成了知交。
years of age 年纪，年龄
I've been in trouble since I was eleven years of age .我从十一岁起就麻烦不断。
yearn for . be filled with a longing desire for 渴望；向往；思念
He yearned for his native land．他思念故土。
yield to . comply with；give way to；submit to 顺从；让步；屈服于
He is not the kind of people to yield to threats．他不是那种屈服于威胁的人。
He yielded to temptation．他屈服于诱惑之下。
The disease yielded to treatment．这病经过治疗好了。
She did not yield to his advice．她不听他的劝告。
Z
zero hour . the exact time when an attack or other military action is supposed to start 发动攻击的时间；采取军事行动的时间
The company was told that their zero hour was three o’clock a．m．连队奉命于凌晨三点开始行动。
zero hour . the time when an important decision or change is supposed to come；the time for a dangerous action 做出重要决定或重要变动的时间；关键时刻；危急关头
It was zero hour and the doctor began the operation on the patient．那是个关键的时刻，医生开始为那个病人动手术了。
zero in on . adjust a gun so that it will exactly hit a target；aim at 向…瞄准
The plane zeroed in on the enemy's arms factory and destroyed it with one bomb．飞机瞄准了敌人的军工厂，一枚炸弹就把它炸毁了。
zero in on . give full attention to 全神贯注于；集中注意力
Let's zero in on this problem today．我们今天研究这个问题。
The children zeroed in on the toy display．孩子们聚精会神地观看玩具展览。
zip up . add life，zest or interest to 给…增加生气、风味或兴趣；增添滋味
A little garlic will zip up the salad．加点蒜头能使色拉更加可口。
zip up . fasten or close by means of a zip fastener拉上拉链
He put the money into his briefcase and zipped it up．他把钱放进了手提包，然后拉上拉链。
zip code 邮政编码
I just forget about my zip code. 我忘记邮政编码了。
The search screen provides a form to enter a zip code. 搜索屏幕提供了一个表单用以输入邮政编码。
You might use this command to collect your user's name or zip code.您可能会使用该命令来收集您的用户的姓名或邮政编码。
Remember to write the return address and the zip code. 务必写上回信地址和邮编。