该激素有正、负双向效应。
青少年偶像崇拜是心理学问题，也是一种社会文化现象，它具有正面和负面双向性特点，但在现实中负向效应很大。
Youngster's idolatry is not only the psychological problem but also a social cultural phenomenon, which has positive and negative effect.
本文利用一个考虑了沙尘气溶胶短波辐射效应的天气-沙尘双向模式，对南疆盆地一次冷空气东侵而引起的沙尘天气进行数值模拟。
To study the radiative effect of dust aerosols on synoptic-scale system and the dust transport, an interactive weather-dust model including shortwave radiative effect of dust aerosols is developed.
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