Conservation of matter
[化] 物量守恒; 物质常住
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
matter
['mætɚ]
n. 事件;（讨论、考虑等的）问题;重要性;物质;
vi. 要紧，重要;化脓;有重大影响;有重要性;
🗣️ 情景例句
Governments wage a constant war against counterfeiting.
政府掀起持久的打假活动。
I invited him to come over, but he wouldn't.
我请他过来，但是他不肯。
Which school were you at last year?
你去年在哪所学校读书？