这些课程介绍的是统计学理论的基础。These courses provide the groundwork of statistical theory.介绍的方式很重要.The manner of presentation is highly important.对于音乐爱好者来说,他是无须介绍的.He needs no introduction to the music loving public....
我感觉到她深褐色的头发拂过我的肩。I felt her dark brown hair brushing the back of my shoulder.她有着一头深褐色头发，身材高挑。She was a statuesque brunette.她的头发是深褐色的。Her hair was rusty brown....
He has always protested his innocence.他一直申辩自己是无辜的。I protested, but she carried on regardless.我极力反对, 但她仍一意孤行.The accused man protested his innocence.被告申明自己是无辜的....