他怯生生地踏上了玻璃桥，手指紧扣栏杆发白。
He took a timorous step onto the glass-bottomed bridge, his knuckles white as he gripped the railing.
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解释
timorous 在此形容因恐高而行动极度犹豫、身体紧张的状态。
He took a timorous step onto the glass-bottomed bridge, his knuckles white as he gripped the railing.
timorous 在此形容因恐高而行动极度犹豫、身体紧张的状态。