Pentasaccharides
五糖
🗣️ 情景例句
OK. I'll take that one.
好，我就要这一辆。
Step by step the ladder is ascended.
登梯需要逐级登。
He sent yet another fax informing the journalist that if he did not reply soon he would be fired.
于是他又发了一份传真，通知那位记者说，若再不迅速答复，将被解雇。