环境阻力(Environmental resistance)指妨碍生物潜能(内禀增长率的最大值)实现的环境因子的总和,也就是种群实际增长与其内禀增长率之间的差距。包括生物因子和非生物因子,如生存空间的限制、食物不足的限制、水分不足的限制,以及生物捕食的限制等。
外来杂草之所以能在传入地产生危害,与它们所具有的某些特性和当地缺乏环境阻力密切相关。
This is closely related to certain characteristics of the exotic weeds and to lack of environmental resistance.
结论当人体的环境压力增加时,经面罩提供大于咽鼓管通气阻力的正压呼吸可以预防耳气压伤的发生。
Conclusions When environmental pressure was added, positive pressure breathing higher than the ventilative resistance of the Eustachian tube could prevent ear barotraumas.
低滚动阻力轮胎提供很少在潮湿环境中的抓地力。
Low-rolling resistance tires offer very little grip in wet conditions.
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