Old English unfealdan, "to open or unwrap the folds of," also figuratively, "to disclose, reveal, explain," from un- (2) "opposite of" + fold (v.). Similar formation in Middle Dutch ontvouden, German entfalten. Intransitive sense is attested from late 14c. Related: Unfolded; unfolding.
实用例句
1. The outcome depends on conditions as well as how events unfold.
结果取决于条件，还取决于事件的进展。
来自柯林斯例句
2. to unfold a map
展开地图
来自《权威词典》
3. Buds unfold in the sunshine.
花蕾在阳光下开放.
来自《简明英汉词典》
4. When the bird lifts off into flight, its wings unfold to an impressive six-foot span.
