✅ 同义词
🗣️ 情景例句
My computer was infected by a virus, I guess since I didn't have firewall installed.
我的电脑受到病毒感染了，我想是因为我没装防火墙。
Please come in; you're right on time.
请进，你正好准时到来。
One day she came into his office and happened to put her hands on the door of a locked safe.
一天，维拉走进父亲的办公室，偶然把手放在一个锁着的保险柜的门上，