1.the approach of 驶进；临近

例句：With the approach of spring the days begin to draw out quite noticeably.
春天临近，白昼明显地越来越长了。

2.keep up 保持；继续

例句：I keep up to date with the news by listening to radio.
我通过听收音机了解最新消息。
3.flakes of 一些，片状的

例句：We watched the flakes of ice drift downstream.
我们看着薄冰层顺流漂去。

4.the symbol of ...的标志；...的象征

例句：The olive branch is the symbol of peace.
橄榄枝是和平的象征。