Tetrabase
[医] 对对四甲基二氨基二苯甲烷
🗣️ 情景例句
Where do I board my train?
我的座位在哪儿？
One good turn deserves another.
以德报德。
But suppose the earth could be covered with sensors spaced one foot apart,
假设地球上可以布满传感器，每个相隔1英尺，