1.The population of the city was thinned out by the black death.
这个城市的人口由于黑死病而减少了。
2.It would have been better to have thinned the trees over several winters rather than all at one time.
当初要是分几个冬天来疏剪树木,会比一次性疏剪要更好些。
3.The point used by Clovis people differs slightly from later points, in the way that the base of the stone is thinned—it's thinner toward the base, the part that's attached to the spear.