Collimators
n. 准直仪; 描准仪
🗣️ 情景例句
We'll call in a couple of days.
我们两三天后打电话。
San Diego. I got back yesterday.
圣地亚哥，我昨天才回来。
We'll stay here with you until help comes.
在有人来救援前，我们要留在这儿。