1. across 介词: (表面)横穿/越过;遍及;穿越(=through);在...对面;交叉
副词: 横过;交叉地;在对面
如: You must swim across the river.
She stood there with arms across.
2. wide 形容词: 宽的 如:This is a wide river.
副词: 宽宽地(≠widely 广泛地)
broad 只做形容词: 宽的/广泛的 有引申义,如: broadband 宽带(网)
3. wide和broad指物体宽度上基本上没有区别
但就人的身体部位而言,脖子以上用wide,脖子以下用broad
如: He kept his eyes wide open.
He has broad shoulders.
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