这种新式武器太惨无人道而不宜使用。
Witnesses corroborated the policeman's statement.
见证人证实了警察的陈述。
No one knows for sure how people first learned to preserve food.
没有人确切地知道当初人们是如何学会保存食物的。
We will interrogate the two suspects separately.
我们要对这两个嫌疑人进行分别审讯。
He often speaks in an arrogant tone.
他经常以一种傲慢的口气说话。