Gras
abbr. 一般认为安全（Generally Recognized as Safe）
🗣️ 情景例句
OK. I understand. Thank you.
好吧，我懂了，谢谢你。
How did you find him?
你是如何找到他的？
Now move the hand to and fro and around but not up and down.
然后把手前后左右以及旋转摆动，但不要上下摆动。