Chromoradiometer
X線量感色計
??? 情景例句
What basic principles do you apply to your life?
你在生活中最基本原則是什么？
What's the population of China?
中國有多少人口？
One Monday, there were fewer people in the shop than usual when the woman came in,
有一個星期一，當這位婦女走進這家商場時，里面的人比往常少，