Thus Euglena shows a diurnal rhythm in the speed at which it moves to a light source. 當眼蟲被放在強光下時，仍能表現出晝夜節律。
It is probable that some suppression of the endogenous corticosteroid diurnal rhythm is caused by long-term corticosteroid usage. 很可能長期應用皮質類固醇激素引起了某些內源性皮質類固醇晝夜節律的受抑。
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