He also thought about the birches in the depths of the valley where, according to him, at a depth of several meters beneath the surface some moisture was hidden.
他還想到了山谷深處的樺樹,據他說,在地表下幾公尺深處隱藏著一些水分。
As for the air, there is always some moisture in the atmosphere, but when the amount increases a great deal, it affects the light waves.
至於空氣,大氣中總是有一些水分,但當水分大量增加時,就會影響光波。