Keratoelastin
鱼卵壳蛋白
🗣️ 情景例句
A good medicine tastes bitter.
良药苦口。
From 4 to 4:30.
四点到四点半。
If we remain inveterate smokers, it is only because we have so often experienced the frustration that results from failure.
如果我们烟瘾大，戒不掉，那是因为屡戒屡败，失去信心。