Who is that over there?

那边那个人是谁？

What do you know about the tenth century?

有关十世纪的事你知道些什么？

One of my suitcases is small,and the other one is medium size.

我的一个提包是小的，另一个是中等的尺寸。

My right arm hurts. It hurts right here.

我的右手臂受伤。 它恰好受伤在这里。

I've definitely decided to go to California.

我毫无疑问决定了去加利福尼亚。

I couldn't keep the appointment because I was sick.

我不能赴约因为我病了。