Chromosorb
红色硅藻土色谱载体
🗣️ 情景例句
I see. By the way, how many people are working in your factory now?
哦，我知道了。顺便问一下，现在贵厂有多少在职职工？
Look before you leap.
慎思而后行。
Neither of us realized that night that these carvings and paintings dated back 15,000 years,
我们没有意识到这些刻画追溯到15，000年前，