Nabla
纳布拉琴, 劈形算符(数学符号), 微分算符[子]
🗣️ 情景例句
who really needs to be wearing a tuxedo,
真正需要穿燕尾服的人，
Music hath charms to soothe the savage beast.
音乐有抚凶暴心灵的魅力。
With all these mouths to feed, he didn't know what to do.
由于有那么多人要供养，他不知道怎么办才好。