The energy content of fuels is directly related to the mass and not volume.与燃料的发热值直接有关的是质量而不是容积.Pope John Paul celebrated mass today in a city in central Poland.教皇保罗二世今天在波兰中部的一个城市主持了弥撒。There is a heterogeneous mass of pa...
On his desk is a mass of books and papers.他的书桌上有大堆的书籍和文件。In the spring, the meadow is a mass of daffodils.春天，草地上开满了黄水仙。Only with mass direct action will we obtain such change.只有采取大规模直接行动，我们才会取得这样的改变。...