Amberplex
离子交换膜
🗣️ 情景例句
What's that?
什么问题？
One cannot make bricks without straw.
巧妇难为无米之炊。
Sometimes a tame elephant is tethered nearby to give the wild one confidence,
有时，把一头已驯服的象拴在旁边能给野象以信心。