单词：thin out
使稀薄, 使稀疏
thin out的用法和样例：
例句
- The paint was thinning out on the old barn.颜料在仓库里渐渐变淡了。
- If your sweetie is left behind at home while you're out on a new adventure, the warm welcome you usually receive on your return could be cooler.如果你把你的爱人留在家里一个人，一个人在外面打拼，家的温暖会变淡的。
词汇搭配
- out of thin air无中生有地