Kalvar
卡尔瓦尔光致散射体
🗣️ 情景例句
His yearly salary is in seven digits.
他的年薪是7位数。
If you want a thing (well) done, do it yourself.
要想做好事情，就要自己动手。
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。