Opaques
(opaque 的復數) n. 不透明物\\na. 不透明的, 不傳熱的, 不傳導的, 陰暗的\\n[計] 白底
??? 情景例句
Are you involved in any extra-curricular activities on campus?
你在學校參加過任何課外活動嗎？
Do not sell the bear's skin before you have caught the bear.
熊未到手休賣皮（勿過早樂觀）。
Why not do a tomato experiment?
干嗎不做西紅柿實驗呢？