🧩 词语组成解析
radar
['redɑr]
n. 雷达;雷达装置;无线电探测器;
🗣️ 情景例句
So, you're an exchange student.
哦，你是一名交换学生。
A man becomes learned by asking questions.
要长学问，就得多问；多问则业精。
Two factors weigh heavily against the effectiveness of scientific research in industry.
两个因素严重地影响工业里科学研究的效果：