Background count
[医] 本底计数
🧩 词语组成解析
🗣️ 情景例句
Your big moment is at hand.
你的重大时刻即将到来。
Try not to be so timid when you speak.
你讲话的时候不要那么紧张。
The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over.
曾在陆地上生活过的动植物的遗体被保存下来的更为罕见，因为陆地上几乎没有什么东西覆盖它们。