His offspring are diligent and intelligent.
他的子女既勤奋又聪明。
The clouds omen rain.
这乌云预示要下雨。
These clouds are ominous.
这些云是不祥的预兆。
The typist omitted the last letter.
打字员遗漏了最后一个字。
The street lights are usually turned on at 7:30.
街灯通常七点半开。
The books are on the table.
书在桌子上。
I've been there more than once.
我不止一次到过那儿。
Once water begins to boil, its temperature no longer rises.
水一开始沸腾，温度就不再升高。
One day in May, she met a young man.
五月里的某一天, 她遇见一位年轻人。
I don't have a pen. Can yon lend me one?
我没有笔, 你能借我一支吗?
He went to see the doctor at the onset of a cold.
他开始感冒时便去看医生了。
The window is made of opaque glass.
这扇窗是用不透明的玻璃做的。
We revved up rehearsals for the opening of the play.
我们为戏剧的开演更加紧排演。
The cattle got out of the field through an opening in the fence.
牛从围栏缺口跑出了牧场。
My opinion is different from yours.
我的看法与你的不同。
I have no opinion on that question.
我对那个问题没有意见。
We beat our opponents at football.
我们在足球赛中击败了对手。
He socked his opponent on the jaw.
他殴打对手的颚部。
May I take the opportunity to express my thanks?
我可不可以利用这个机会来表达我的感谢?
What a prodigious opportunity you have missed!
你失去了一个绝好的机会。