硬水使壶生水垢.Hard water furs the kettle.硬水使水壶生了垢.Hard water furred the kettle.经过加入碳酸钠能被软化的硬水,称为永硬水.Hard water which can be softened by adding sodium carbonate is called permanent hard water....
官员们对于会谈情况保持缄默.The officials maintained a wall of silence around the talks.我们不应对这件可耻的事保持缄默.We should not pass over this disgraceful affair in silence.侦探们犯了难，半岛上各个群体抱成一团，达成了保持缄默的密约。Detectives have run into a conspiracy of ...
The concepts of radiant emittance and of irradiance are complementary.辐射的发射强度和辐照度是两个互补的概念.Emittance and irradiance are meaningful measurements of flux at a specific surface.发射强度和辐照强度只有对一定表面上通量的量度才是有意义的.A high quality bea...