活梯;
单词解说
step,脚步,ladder,梯子。
He also made the first pair of bifocal glassed and invented a musical instrument called the glass harmonica and the stepladder chair.
他还制作出了世界上第一幅双光眼镜,发明了玻璃碗琴和活梯。
Tell him to back down carefully. The stepladder is not steady.
告诉他小心下来, 活梯不稳.
A tall stepladder stood in front of an opening which the grille had covered.
在原来铁栅栏盖着的那个洞口前面,放着一个高梯凳.
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