后半的英文：
second half

参考例句：

"Keep your eyes wide open before marriage, and half shut afterwards"
婚前张开眼,婚后半闭月

The Industrial Revolution started in England at the second half of the 18th century.
工业革命于十八世纪后半叶在英国开始。

We are now into the second half of the parliament.
我们现已进入了本届议会的后半任期。

He always stuck in the middle, everybody recollecting the latter part except himself.
他总是中途难住，除他之外大家都记得起后半部分。

By the later part of the sixteen hundreds, small hand-held camera obscuras were commonplace
到17世纪后半叶时，小的手提式暗箱已经很普通了。

second是什么意思：
adj. 第二的；第二次的；次要的
adv. 以第二位
n. 秒；第二名
v. 支持，赞同

the second in command
副司令员

grounded to the second baseman.
打到二垒手位置的滚地球

Down Second Avenue
沿着第二条林荫大道走去

'You' is a second person pronoun.
你是第二人称代词。

Habit is second nature
习惯成自然

half是什么意思：
n. 一半；半场，半局
adj. 一半的，不完全的
adv. 一半地，部分地

That is a job and a half.
那是非常困难的工作。

half-believe ";"half believing, half doubting
将信将疑

His reply was taken half seriously half in jest.
他的答覆看来是半开玩笑半认真的。

a half - and - half mixture of linseed oil and turpentine.
亚麻籽油和松节油两种成分各占一半的混合物