无论如何，与那种认为人口以几何级数持续增长的观点相反，从长远的观点来说，人口可望受到生产力的调节。
Either way - contrary to popular belief in constant geometric growth - population can be expected in the long run to adjust to productivity.
某些高级数码相机可以使用一张中性白色卡片调节白平衡。
A neutral white card may be used to set the white balance level on some advanced digital cameras.
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