比较了感染率的季节性波动和对 Corbicula fluminea 的危害。
The seasonal fluctuations about infectation percentage and the harm on the Corbicula fluminea were compared.
发病的年度波动不明显，但有季节性波动，即春夏高于秋冬季。
Seasonal fluctuation in incidence of this disease was observed, being higher in the spring and summer and lower in the autumn and winter.
股票市场季节性波动是股票投资收益的短期波动理论，这种现象在许多国家的股票市场中存在。
Stock market seasonal fluctuation is a part of short time fluctuation theory in stock investment return. This kind of phenomenon exists in the stock market of a lot of countries.
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