Ulf
n. 超低频
🗣️ 情景例句
Where are you from?
你是从哪儿来的？
Working without a plan is sailing without a compass.
工作没有打算，犹如航海没有罗盘。
Many of the stars cannot be seen because they are too far away.
许多星星我们之所以看不见，是因为它们离我们太远。