He left two hours ago and he should be there by now.

他是两小时前离开的，到现在应该已经到那里了。

youdao

He left two hours ago. He must have arrived home.

他两个小时前就走了。他一定到家了。

youdao

The plane left two hours ago.

飞机两小时前起飞。

youdao

Let's create a graph here that on the x axis it's going to be time, so time zero will be when you first take in a food and then one hour later, two hours later will be shown as you go from left to right, and then we'll have blood glucose level up on the y axis.

我们在这建立一个曲线图,X轴代表的是时间,所以零时间点是你第一次进食的时间,然后一小时以后,两小时以后,是从左到右呈现在图表上的,在Y轴上是你的血糖值

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