Bootlessly
adv. 无益地
🗣️ 情景例句
Nothing ventured, nothing gained.
不入虎穴，焉得虎子。
My underwear is black.
我的内衣是黑色的。
its action depends on the surface, water or ground, over which it rides.
它的飞行取决于它所悬浮的水面或地面。