Unobservable
a. 难以察觉的；注意不到的；不可见的
✅ 同义词
🗣️ 情景例句
He needs to work.
他需要工作。
I'd like to have a seat by the window.
我要一个靠窗的座位。
Three million people watched as the ashes of this great man were gently poured into the brown waters of the river that would carry them to the ocean.
还有300万人守望着这位伟人的骨灰缓缓撒入褐以的恒河，河水把他的骨灰送向大海。