Ballon d'essai
n. <法>问路石子,试探气球,测风气球
🧩 词语组成解析
[经] 广告用气球
🗣️ 情景例句
There's your sleeping bag.
这是你们的睡袋。
Let the hands get busy, not the mouth.
手要勤劳，嘴莫多说。
I have never been able to look at a snail since then.
从那以后，我再也不能看一眼蜗牛了。