Procarcinogen
前致癌剂
🗣️ 情景例句
Would you like to see them?
要不要看一看？
Keep thing seven years and you will find a use for it.
备而不用。
For example, you can send information abroad immediately, but mailing a letter might take a week or so.
例如，你能够马上发送信息到国外，但寄一封信可能要大约一周的时间。