adj.(服务)不必预约的,未经预约而来的;(储存区)宽敞得可以走进人的;
例句:
Your shoes will be in a fine state if you walk in the mud.
你要是在泥里走路,你的鞋就会弄得很糟糕.
You won't need a ticket — just walk in.
你不需要票,直接进去吧.
He usually takes a short walk in the evenings.
通常它天天晚上都要散步.