例句： I don't agree with all you say, but I'll let it go at that.

例句： Pollution of the water supply reached a level pernicious to the health of the population.

例句： Don't ask me to explain unless you really don't understand.

例句： The government is taking steps to control the rising crime rate.

例句： The doctor inserted a steel plate into his damaged leg.

例句： His elder sister had been his guide, counsellor and friend.

例句： Spring is here.

例句： possessed great tact.

例句： He repeated her statement word for word.

例句： Her steady gaze did not waver.