Train arm
[机] 轮系臂
🧩 词语组成解析
arm
[ɑrm]
n. 臂;武器;[复数]战事;权力;
vi. 准备（斗争），准备行动（against）;
vt. 装备（防御工事）;准备（攻击或迎击）;配备;防护;
🗣️ 情景例句
He did it in no time.
他马上做了那件事。
Better half an egg than empty shell.
半只蛋也比空壳好。
Well, I had been wrong, for I was now lost.
唉，实际我错了，我现在迷路了。