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，包括李威大部份科学家仍然支持饮水加氟，尤其是口腔卫生差社区，因为这是证明可以控制蛀牙方法。

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.

过度抽水做为饮用水和用来灌溉许多区已经使水位降了几十米，迫使人们使用质量差水来做为饮水。