Polycalcium
多种钙
🗣️ 情景例句
People don't ask questions about a person's salary.
人们不问一些关于收入的问题。
We waved until the car was out of sight.
我们挥手直到汽车消失。
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。