Polyhydrazide
[化] 聚酰肼
🗣️ 情景例句
Maybe I can help. Tell me what it is, Susan.
也许我能帮忙。说给我听听 ，Susan。
Is it too far to walk?
走着去很远吗？
Hello! Sydney 7654392.
喂！我是悉尼7654392。