"Are you less cold now?" said he.
“这样你冷得好一点了吧?” 他说。
It's less cold today than yesterday.
今天没有昨天那么冷。
For most specialty gases, CTFE is recommended over PTFE because it is less permeable to oxygen and moisture, and evidences less cold flow.
对于大多数特种气体,推荐使用CTFE,而不是PTFE,这是因为CTFE对氧气和水蒸汽的渗透性更差,冷变形也较小。
应用推荐