较差的

Analog calculation method, use log - square - antilog. Frequency response is not so good. This type of IC is more common.

模拟计算方法﹐利用对数--平方--反对数。频率响应差﹐这种类型的IC为普遍。

Most of those scientists, including Levy, still support water fluoridation as a proved method of controlling tooth decay, especially in populations where oral hygiene is poor.

不过，包括李威在内的大部份科学家仍然支持饮水加氟，尤其是在口腔卫生差的社区，因为这是证可控制蛀牙的方法。

Overpumping groundwater for drinking water and irrigation has caused water levels to decline by tens of metres in many regions, forcing people to use low-quality water for drinking.

过度抽取地下水做为饮用水和用来灌溉在许多地区已经使水位下降了几十米，迫使人们使用质量差的水来做为饮水。