这些虫子用肉眼看不见。The worms cannot be seen by the naked eye.厕所里爬满了虫子。The toilet was full to the brim with insects.他在花园里被虫子咬了一口.He was bitten by an insect in the garden....
The bus is said to have over-turned and fallen into a ravine.据说巴士发生翻车，跌进了峡谷。Food production has already fallen behind the population growth.粮食生产已经跟不上人口增长。A couple of inches of dry, powdery snow had fallen.下了数英寸厚的粉状干雪。...