由于时差，我晚上很难入睡。

Due to the time difference, I find it hard to sleep at night.

时差让我们很难安排通话时间。

The time difference makes it hard for us to schedule a call.

他们的会议因为时差问题被推迟了。

Their meeting was postponed because of the time difference issue.

旅行时，我总是需要几天来适应时差。

When traveling, I always need a few days to adjust to the time difference.

我们需要考虑时差，因为他在另一个国家。

We need to consider the time difference because he is in another country.

我都忘了时差的问题了.

I forgot about the time difference.

时差也使我感到很虚弱.

Time difference also makes me feel weak.

我在计算时差方面不行.

I am poor in telling the time difference.

我都忘了时差的问题了。？。

I forgot about the time difference .

旧金山跟上海的时差是多少?

What is the time difference between San Francisco and Shanghai?