Chromosorb
红色硅藻土色谱载体
🗣️ 情景例句
Glad to see you. Good-bye.
很高兴见到你。再见。
I invited him to come back, but he wouldn't.
我请他回来，但是他不肯。
Can I have the key to the front door please?
我能带上前门的钥匙吗？