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
Nice to meet you, Mr. Johnson.
很高兴见到你 Johnson先生。
Yes, you can. Would you please show me your card?
可以，让我看看您的卡。
She watched TV for half an hour after supper. Then she started her homework.
晚饭后她看了半小时电视。然后她开始做家庭作业。