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。...
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...