Investors may encounter other unexpected difficulties .

投资者或许还会遇到其它意想不到的困难。

I don 't think this was unexpected .

我不认为这是出乎意料的。

Being happy is a sort of unexpected dividend .

快乐是一种意外获得的奖励。

Unexpected problems could hamper the expansion of ipv6 .

意料之外的问题有可能妨碍到ipv6的扩张。

Trees across the tropics are getting bigger and offering unexpected help in the fight against climate change , scientists have discovered .

科学家们发现热带地区不断生长的树木在抵御气候变暖的问题上提供了意外的帮助。