Karidium
氟化钠
🗣️ 情景例句
Hi, Son.
嗨 儿子。
I wonder what he's doing.
我不知道他在做什么。
What a relief it was when the boulders suddenly disappeared, giving way to a stretch of plain where the only obstacles were clumps of bushes.
突然大石块不见了，前面是一片平地，唯一的障碍只有一簇簇灌木丛。这使我们长长地松了口气。