怎么说,有关定于从句的事儿好多人也都说我的用法是不是太过于随意了,但是我请教过一些人都说这种写法,他们不是很在意,也没有那么严苛的。
for的用法,在平时阅读书籍的时候也没有发现一定要加逗号才能表示原因。不过我会尽量按照标准来写。
tunnel of the city 这个不知道为何非要改作in, 想想可能 of the city的表格太过于中式了
【8.8】综合写作
The passage say that using Hydrogen and fuel-cell engines can solve the present problems that automobile have brought. But professor didn't agree.
First, passage says that, Hydrogen is easily available. But professor say not. To use the Hydrogen for fuel-cell engine, Hydrogen must be obtained as liquid state, and that is a highly artificial substances requires technics and many sophisticated methods. Besides, it's must be stored in -230 degree, that requires cooling technics. So, Hydrogen is not as available as passage have indicated.
Second, passage say that using hydrogen as fuel is an environment-friendly choice but professor say that using Hydrogen will not solve the problem of pollution for manufacturing Hydrogen will cost numerous energy. Purification is costly. During the manufacture process, burning coals and oil will emit pollution gas as well though the car using Hydrogen doesn't pollute.
Third, passage say that fuel-cell engines is so efficient that customers will benefit from them but professor say that cars that use fuel-cell engines will not save the money because the engines is made of a kind of material. The material is hard to obtain and very expensive. (这好像少了一个点,这些物质是hydrogen反应的必须物质)Hence, using fuel-cell engines will not save money.
So that professor don’ agree with what passage have said.