No, you sound different today.

没有，今天你的声音听起来不一样。

Then, please tell him that Zhao Li called.

这样好了，请转告他赵力来过电话。

I'm afraid I'll be tied up tomorrow at ten.

恐怕明天上午10点我很忙。

I'll try to squeeze you at 2:30 p.m.

你来如何？我会在下午2点半挤出时间的。

Please have two window seats placed aside for us.

请为我们保留两个靠窗口的位子。

Will you be so kind as to help me out of the difficulty?

帮助我克服困难，好吗？