Backdoors
adj. 后门的；秘密的；欺诈的；鬼鬼祟祟的，偷偷摸摸的；不正当的
🗣️ 情景例句
Oh, Robbie!
哦 Robbie！
His hand is swollen, Does it hurt?
他的手肿起来了，疼不疼？
Is the population of the world still growing?
世界人口仍然在增长吗？