It is not often that you get such an opportunity.
你得到这样的机会，可不是常有的.事。
Men often don't like to share their problems.
男人往往不喜欢把自己的问题告诉他人。
We don't often have time to talk.
我们常常没有时间谈话。
People are often afraid of things they don't understand.
人往往对自己不懂的东西感到恐惧。
I often think about my friends back home.
我常常想起老家的朋友。