✅ 同义词
🗣️ 情景例句
If there's anything you need, just knock on my door.
有什么需要帮忙的话，尽管敲门来找我。
Would anyone like seconds?
谁要换其他的饮料？
They also have the disadvantage of being an expensive form of transport.
飞机另一个缺点是昂贵。