I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解,但是,这个条件对我们是必要的。
'Jumbo must weigh a few tons,' said a policeman afterwards, 'so it was fortunate that we didn't have to carry him.
“江伯一定有好几吨重,”一个警察事后这样说,“值得庆幸的是它没让我们抬它走。