1.
He joined up at seventeen.
他17岁时参的军。
2.
In New Haven, at the age of 43,
在纽黑文，43岁时，
3.
He retired at the age of sixty.
他于60 岁时退休。
4.
He enlisted when he was eighteen.
他18岁时参军了。
5.
A textual criticism on the divining customs of New Year days in Jingchusuishiji;
《荆楚岁时记》岁首占候风俗的文献考辨
6.
His first appearance on stage was at the age of three.
他三岁时初次登台.
7.
His voice broke when he was 15.
他15岁时嗓音突然变了。
8.
His first appearance on stage is at the age of three.
他三岁时初次登台。
9.
Louis died when he was only 42.
路易斯42岁时就去世了。
10.
At 40, he was in his prime and full of vigour.
他40岁时正年富力强.
11.
Most babies are weaned by the time they are one.
婴儿大多在一岁时断奶。
12.
When he was thirty, he began to lose his hair.
30岁时，他就开始脱发。
13.
Al Herpin died at the age of 94.
阿尔?赫平于94岁时去世。
14.
The boy became an orphan at six.
那男孩六岁时成了孤儿。
15.
He has been an orphan since he was five.
他五岁时即沦为孤儿.
16.
He ran away from home at the age of14.
他14岁时离家出走。
17.
They don't appear until the child reaches 2 to 6 years of age.
直到2-6岁时才长出来。
18.
She was deprived of schooling at ten.
她10岁时就失学了。