Translation of "expectancy" into Chinese

Tom isn't here yet, but we expect him soon.

湯姆還不在這裡,但我們期待他很快就來。

We shouldn't expect too much help from Tom.

我們不該期望從Tom那得到太多幫助。

This was due to weaker than expected tourism arrivals growth.

这是由于实际到访游客人数低于旅游到访人数增长预期。