如果育雏室内通风不良，氧气就会逐渐减少，二氧化碳浓度增大，使空气变得污浊起来。
If the brood indoor and ventilated bad, oxygen will gradually reduce the concentration of carbon dioxide, air pollution, increase become up.
每天你都会减少吸烟的数量并逐渐减少你对尼古丁的依赖以便使你的身体逐渐适应没有尼古丁的日子。
Each day you smoke less and gradually reduce you nicotine dependence while preparing yourself to quit for good.
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