Undistinguishable
a. 难辨别的, 难区分的
🗣️ 情景例句
He told me to call him about my project,
他叫我打电话给他， 跟他谈我的作品计划，
It seems he's the big boss.
看起来他好像是大老板。
After making a short test flight at 4,15 a.m.,
布莱里奥凌晨4点15分作了一次短距离试飞，