重點(diǎn)講解：
1. concentrate on 全神貫注；集中（心思）；
Please concentrate on the business at hand and don't drag in irrelevant issues.
請你集中談這件事，不要牽扯其他問題。
2. take effect 生效；見效；開始起作用；
After the policy took effect, more students chose jobs in areas like teaching and the nonprofit sector.
該舉措生效后，越來越多的學(xué)生選擇了教學(xué)和非盈利性質(zhì)的工作。
3. speak highly of 說…的好話；稱贊；
All who know him speak highly of him.
凡是認(rèn)識他的人，沒有不稱贊他的。
4. call off 取消；
If the bad weather should continue, we would have to call off the match.
如果這種惡劣天氣持續(xù)下去，我們就只好取消比賽了。