3. Scientists at Ohio State University have discovered a very interesting rock from what was once a shallow sea in Nevada. 美国俄亥俄州立大学的科学家们发现了一种曾在内华达州浅海非常有趣的岩石。
英英解释
n.
1. a stretch of shallow water
2. make shallow
3. become shallow adj.
1. lacking physical depth; having little spatial extension downward or inward from an outer surface or
2. not deep or strong; not affecting one deeply
3. lacking depth of intellect or knowledge; concerned only with what is obvious