Elatrometer
[化] 气体密度计
🗣️ 情景例句
Richard and Marilyn bought it for me for my birthday.
这是Richard和Marilyn送给我的生日礼物。
Peter began to hear about the interesting new play.
彼德开始听到新放映的电视剧很精彩。
It's always warm in September and October.
9月和10月总是很暖和，