Prebiotic
a. 生命起源以前的
🗣️ 情景例句
It's us, Susan.
是我们， Susan。
She's been a bit under the weather recently.
她近来身体不太好。
We had spent several days in a small town and visited a number of old churches in the vicinity.
我们在一座小镇上逗留了几天，参观了附近的许多古老的教堂。