Radiocolloid
[化] 放射性胶体
🗣️ 情景例句
then you've got to smile first.
你就得先笑一笑。
Today is May 21st.
今天是五月二十一号。
They will be able, as it were, to see and hear us in action.
他们能够身临其境般地观看我们做事，倾听我们讲话。