Cobalamine
[化] 钴胺素
🗣️ 情景例句
Well, I wasn't clear about my future,
我对自己的未来当时也不清楚，
Please make an offer indicating the packing.
请报价并说明包装情况。
We really need that material, you know.
你知道，我们急着需要那批材料。