Mascons
(mascon 的复数) n. 质量密集
🗣️ 情景例句
The new students seem to be shaping up quite nicely.
新生们看来表现得相当不错。
What is happening down there?
下面发生什么事情？
Mrs.Richards realized that it must be the man from the Electricity Board who had come to read the metre.
理查兹夫人这才想到一定是供电局来人查电表了。