Subthreshold
a. 次于最低限度的, 不足以引起作用的
🗣️ 情景例句
She was in love with Donald McGrath,
她爱上了Donald McGrath，
Keep your mouth shut and your eyes open.
要多看少说。
Even a telescope in orbit round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles iron solar system.
即使是一台放置在围绕地球的轨道上的望远镜——如非常成功的哈勃望远镜——也因为太阳系中的尘埃微粒而无法胜任。