这句话该怎么解释The expenditure is small compared to the expenditure on nuclear research

这句话该怎么解释The expenditure is small compared to the expenditure on nuclear research There had been concern about the state of the English language.这句话里concern的解释是什么?整句话该怎么翻译?concern为什么不加-ed? ? 这句话怎么解释? 怎么解释这句话? The soil is not_______washed away thanks to the tree.(easy)该怎么填谢谢这句话用easily的话怎么解释 The worst part about .这句话中ever怎么解释! jesus take the wheel这句话该怎么翻译啊? snow lay thick on the ground.这句话该怎么理解呢 地上积着厚厚的雪.这里积没有解释啊 “我爱你”这句话怎么解释 这句话怎么解释.英文 不猴不性福、这句话怎么解释 癞蛤蟆想吃天鹅肉这句话怎么解释? 民以食为天 这句话怎么解释 民以食为天 这句话怎么解释. 退一步海阔天空这句话怎么解释? The moonlight is shining in through the window.这句话怎么解释,怎么两个介词连用? The youth,the love for the idiot.这句话怎么解释 心里始终有你 该怎么解释这句话的意思?