doze
n.打瞌睡
Grandad was dozing in his chair.爷爷在椅子上打瞌睡。
expand
v.扩大，扩张，扩展;膨胀
Water expands as it freezes.水结冰时会膨胀。
expansion
n.扩大，扩张，扩展;膨胀
The rapid expansion of cities can cause social and economic problems.
城市规模的迅速扩大会带来各种社会和经济问题。
expect
vt.预料，预计;等待，期待，盼望;要求
The company expects to complete work in April.
公司预期在四月份完工。
