重點講解：
1. on hold 推遲；中斷；
The project is on hold until more money is available.
這項工程暫停，等到有更多的錢時再進行*sP2W!Cz&33。
2. knock over 撞倒；
He was knocked over by a bus and broke his leg.
他被一輛公共汽車撞倒，一條腿折了IVb|(xG3a|TFI。
3. be based on 以…為基礎(chǔ)；
The selection process is based on rigorous tests of competence and experience.
選拔過程是基于對能力和經(jīng)驗的嚴格測試sn%J].aCHU,;yA!oVPZ。
4. be unlikely to do sth. 不太可能的；未必會發(fā)生的；
As with many technological revolutions, you are unlikely to be aware of it.
就像諸多的技術(shù)革命一樣，你可能不太會注意到它z=FpJ)c|(#@。