The stair treads were covered with rubber to prevent slipping.楼梯踏板上覆盖着橡胶以防滑.He unwarily treads upon a viper asleep just before his feet.他不小心踩到正睡在他脚前的蛇上.So she treads lightly , trying to create a collegial atmosphere, una...
The stair treads were covered with rubber to prevent slipping.楼梯踏板上覆盖着橡胶以防滑.During Christmas everybody treads on air.圣诞节期间每个人都喜气洋洋.He unwarily treads upon a viper asleep just before his feet.他不小心踩到正睡在他脚前的蛇上....