Page 1
Early in the morning, tiny drops of water sometimes sit on grass, leaves, or spider webs.
清晨的时候，草叶、花瓣或蜘蛛网上，有时会挂着一颗颗小小的水珠。正文预览
Page 2
These drops are called dew.
这些小水珠，就叫露珠。
Page 3
Air always holds some water vapor, even when we cannot see it.
空气里一直都含有一些看不见的水蒸气。
Page 4
At night, the ground and plant surfaces often cool down as they lose heat.
到了夜里，地面和植物表面会慢慢散热，因此常常变得更凉。
Page 5
If a surface becomes cool enough, water vapor in the nearby air can change into tiny liquid drops on that surface.
当表面凉到一定程度时，附近空气里的水蒸气就会在表面变成细小的液态水滴。
