重點講解:
1. impose on 強制實行;強加;
The conditions imposed on volunteers were stringent.
對志愿者的限定條件非常嚴(yán)格 。
2. be intended to do sth. 想要;打算;計劃;
The defences ar e intended to obstruct any advance by tanks and other vehicles.
這些防御工事用于阻止坦克等車輛前進 。
3. call off 取消;
He has called off the trip.
他已取消了這次行程 。
4. threaten to do sth. (壞事)可能發(fā)生,將要發(fā)生;
The fighting is threatening to turn into full-scale war.
這場戰(zhàn)斗有可能會演變?yōu)槿娴膽?zhàn)爭 。
vt. 擴大,升高,增強
vi. 逐步升級