no.1是英文Number One的缩写，读音为[ˈnʌmbər] [wʌn]。
重点词汇解释：
1、number
n. 数；（杂志等的）期；号码；数字；算术
vi. 计入；总数达到
vt. 编号；计入；数…的数目；使为数有限
2、one
num. 一；一个；一岁；一点钟
pron. 一个人；任何人，人们（表泛指）；那个人；（特指的）那种人
det. 一个（强调某人或某事）；一个（用于比较相似的人或物）
adj. 唯一的；一的
n. 一美元纸币
1.
He said detection of the radioactive element caesium outside the No. 1 reactor today was "a bad sign" for a core meltdown.
他说今天在第一核电站检测到放射性元素铯，这是核心融化的不好迹象。
2.
There was no sentiment on show in Arsenal's 2-1 defeat as he hacked down Ginola, becoming one of six Arsenal players booked.
在阿森纳输给热刺1：2比赛中，他直接丢翻了吉诺拉，成为阿森纳第六个得黄牌的球员。
3.
It's easy to make eating ice cream a regular habit in the summer, but try to limit frozen treats like ice cream to no more than once a week.
在夏天，吃冰淇淋很容易成为一种习惯，但是要努力限制冰的宴飨比如冰淇淋一周不能超过1次。
4.
China limits each to working on no more than two deals at a time, and deals can take a year or more to complete.
中国限定1名保荐人同时处理的交易不得超过两桩，而每桩交易可能要花费一年甚至更长的时间才能完成。
5
Activated Sludge Model No. 1(ASM1) is often used to predict the behavior of biological wastewater treatment plants.
活性污泥1#数学模型（ASM1）常常用于预测污水处理厂中的生物过程。