Optical density
[计] 光密度\\n[化] 光密度; 黑度
🧩 词语组成解析
🗣️ 情景例句
Tomorrow morning at ten o'clock. Try it.
明早上午十点。来试一试吧。
Did you sell it to him yourself?
你自己亲自卖给他吗？
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？