Ultramicroelectrode
超微电极
🗣️ 情景例句
No. Please endorse the check at the back.
不会的，请在支票背面签名。
I don't know what I should have done without your help.
要不是您的帮助，我真不知道该怎么办。
Do you still have the cock year stamp?
你还有鸡年的邮票吗？