Mass deficiency
質量不足
?? 詞語組成解析
mass
[m?s]
n. 大量，大多;塊，堆，團;[物理學]質量;彌撒曲;
vt.& vi. （使）集中，聚集;
adj. 群眾的;大規模的;整個的;集中的;
vi. 聚集起來;
vt. 使集合;
??? 情景例句
There are probably a lot of places for you to work
也許有很多地方可以讓你去工作。
The comet will appear in the southern sky.
彗星出現在南方的天空。
He was sent to prison for failing to pay his debts and died in poverty in 1836.
他因無力還債而被捕入獄，最后于1836年在貧困中死去。