Once i nourished the entire human race .
过去，我曾经养育过整个人类。
Once he took the vow his loyalty never wavered .
他的忠诚从不动摇。
Once motion stops， hearing is impaired .
一旦动作停止，听觉就失灵。
I have relaxed some standards i once had .
我是从以前的立场后退了。
He realized at once what was happening .
他一眼就看清了当时的情况。
It is expedient that he should go away at once !
他最好还是立刻走掉。
Lighting fixture must be installed at once .
必须立即安装照明设备。
This illegal activity was once commonplace .
这种非法活动曾一度流行。
Mr. collins， i was once an alcoholic .
柯林斯先生，我过去是个酒鬼。
How would we cope once the money had gone ?
钱一用完，我们怎么办
