1. They can locate and steer clear of obstacles----or locate flying insects on which they feed.
    来确定并躲开障碍物，或找到它们赖以为生的昆虫。

2. In India in the meantime, the entire education system has shifted gears to feed the appetite of the American computer industry.
    在此期间，印度对其整个教育体系进行了调整，以满足美国计算机工业的需要。

3. In the Philippines, women were found to contribute about a third of households’ cash income, but 55 percent of household support if the economic value of their activities at home, such as growing food or gathering hay to feed the family donkey, is in
    在菲律宾，人们发现三分之一家庭的现金收入来自妇女，若是将她们家务劳动的经济价值计算在内，比如种粮食和捡干草喂家里的驴，那她们提供的家庭经济支持将占55%。

4. Fish farming is very efficient: producing a kilogram of fish utilizes less than 2 kilograms of feed, but it takes 2.2 kilograms of feed to produce 1 kilogram of chicken.
    养鱼场的生产效率相当的高：生产1公斤鱼类只需要不到2公斤的饲料，而生产1公斤鸡肉需要2.2公斤的饲料。