Cautelous
a. 小心的, 警觉的
🗣️ 情景例句
when Teddy Roosevelt was President.
在Teddy Roosevelt当总统的时代。
You should wear a sweater, It's cold today.
你应该穿一件毛衣，因为今天很冷。
Is anything the matter?
怎么回事呀？