early 14c., of persons, "diseased, wounded," from un- (1) "not" + sound (adj.). Similar formation in Middle Low German unsund, Middle Dutch ongesont, German ungesund. Meaning "morally corrupt" is recorded from c. 1300; that of "not mentally healthy" is from 1540s. Sense of "not based on reasoning or fact" is attested from 1590s. Related: Unsoundly; unsoundness.
实用例句
1. The thinking is good-hearted, but muddled and fundamentally unsound.
这个想法的出发点是好的，但是条理混乱，而且本质上是错误的。
来自柯林斯例句
2. The national tests were educationally unsound.
从教育角度看，全国统考是不合理的。
来自柯林斯例句
3. The church was structurally unsound.
那个教堂的结构很不坚固。
来自柯林斯例句
4. The project is environmentally unsound.
这个项目会破坏环境。
来自柯林斯例句
5. The use of disposable products is considered ecologically unsound.
