by force 凭借暴力；强迫地
by hand用手；用手工的
by oneself 独立地；单独地
by leaps and bounds飞速地，突飞猛进地
by mistake错误地
by name名叫；用名字
by nature天生，本性上
by all means 务必，千方百计
by no means 决不，一点，也不
by means/way of 经由;凭借 (某种方法/
be capable of能会…的；易于做出…的;
be engaged in 从事；进行
be dedicated to献给,奉献与
be rich in 富含有
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