depression of coal的翻译是?

depression of coal的翻译是? for first foot of depression only 怎么翻译 英语翻译coal-accumulated basins of North China 翻译不好 depression的意思是什么 the use of coal and 翻译 take coal for instance 求翻译why we use oil as fuel instead of coal is that it burns b coal dust is explosive.solids lumps of coal are not. 请问张国荣depression那封遗书是真的还是假的 句中double 的词性?I have ordered double the amount of coal that w The great depression 每段的主要内容 recession和depression的区别是什么