a louring sky的用法和样例：
- She looked up at the lowering sky.
- There was heavy cloud and a lowering cloud base.
- A lowering in amount, degree, or position.
- A cloud is a mass of vapor in the sky.
- a lowering sky
a louring sky的相关资料：
a a TV series/show/programme A Review on Cavitation Inception A person of independent means. A Probe into English Collocation a narrowly specialized education a delicate child/constitution a musician who gives recitals. A ACS ALAMEDA CORRIDOR SURCHARGE a district with many brothels. a sick child/relative/bird