Only a third of these households thought it reasonable to meter water.这些家庭当中只有三分之一认为用水表计量是合理的。They have the right to come in and inspect the meter.他们有权进来查表。A man came to read the gas meter.有位男子来查过煤气表。...
A neutron is simply a neutral particle in the nucleus of an atom.中子就是原子核里不带电的粒子。Neutron is neutral and slightly heavier than the proton.中子是中性的,比质子略重.These are far outweighed by the benefits of the neutron activation meth...
我住在朝北的小房间里.I live in a small room facing the north.果园在朝北的山坡上.The orchard is on the northward slope of the hill.朝北的房间能租更高的价钱.Room with a northern exposure can be rented at a higher price....
甲烷和丙烷是烷烃。Methane and propane are alkanes.丙烷气钢瓶a propane gas cylinder亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process....