chapter 8 的Problem Set的第8句
原句:In the Fishcer-tropsch process, whichdevelopedin Germany by Franz Fischer and Hans Tropsch , coalis converted in to a liquid fuel similar to petroleum.
书中改成了 was developed;我想请教一下各位大牛,这个可以改成is developed吗?
一直不知道什么时候用was 和 is,就比如:这个建议是lisa提出的,就可以写成:the suggestion is proposed by LISA; 那如果用was,就等于这个建议是lisa曾经提出的啊..
我觉得理解的时候实在有歧义...
请各位赐教= =