My son had a tantrum and banged his fist on the ground.我儿子大发脾气，一拳捶在了地上。He always flies into a tantrum when he's contradicted.每当不如意时他就会大发脾气.He immediately threw a tantrum, screaming and stomping up and down like a ch...
In 1818 Fresnel entered a competition sponsored by French Academy.1818年菲涅耳参加了法国科学院主办的一次竞赛.The difficulty was resolved by Fresnel with his addition of the concept of interference.菲涅耳通过加进来干涉概念,解决了这个困难.In many cases, the Si...