appearing frequency of fish school中文什么意思

鱼群出现频率

• appear:    vi. 1.出现，露出，显现。 2. ...
• frequency:    n. 1.屡次，频仍，频繁。 2.( ...
• fish:    n. (pl. fishes, 〔集 ...
• school:    n. (鱼、鲸等水族动物的)群；队。 ...