Reflection coeffecient
[电] 反射系数
🧩 词语组成解析
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
Silent men, like still waters, are deep and dangerous.
沈默的人像静水一样，深而难测。
'At ten to eight.I bought a paper and waited for the train.'
“7点50分。我买了张报纸，等着车来。”