500
five hundred
🗣️ 情景例句
Please stay where you are, we'll have a patrol car there in two minutes.
请您呆在原地，两分钟之内我们派巡逻车过来。
This soup has a nice taste.
这道汤真好喝！
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）