业余爱好者

He proficient in it althought his only a afterhours.

虽然他只是个业余爱好者，但却是一流的高手。

Triplets of 36cm with a 30cm "E" objective guidescope for astrographic uses, and numerous smaller refractors of 40cm, 30cm, 25cm down to 6cm achromatic models for use by amateurs and schools.

款36cm口径，还有一个通道是使用30cm &E&型物镜的指引镜，作天体照相或天文定位用途来使用；还有很多小一些口径的折射镜，使用40cm、30cm、 25cm 小到 6cm的消色差镜头型号，供业余爱好者和学校使用。

"Unsupervised use by athletes to build muscle and improve strength can have serious harmful effects, including coronary heart disease, sexual and reproductive disorders, immunodeficiencies, liver damage, stunted growth, aggressive behaviour, susceptibility to connective-tissue injury, and irreversible masculinization."

近年来，为数不断增加业余爱好者和职业运动员已在服用这些药物以促进肌肉发展和增进体力。医学研究已确定促蛋白合成类固醇对仍在发育的年轻人尤其有害，如长期服用会导致包括免疫不全、肝损伤、性器官畸形以及其它反常现象。

"Unsupervised use by athletes to build muscle and improve strength can have serious harmful effects, including coronary heart disease, sexual and reproductive disorders, immunodeficiencies, liver damage, stunt ed growth, aggressive behaviour, susceptibility to connective-tissue injury, and irreversible masculinization."

近年来，为数不断增加业余爱好者和职业运动员已在服用这些药物以促进肌肉发展和增进体力。医学研究已确定促蛋白合成类固醇对仍在发育的年轻人尤其有害，如长期服用会导致包括免疫不全、肝损伤、性器官畸形以及其它反常现象。

"Unsupervised use by athlete s to build muscle and improve strength can have serious harmful effects, including coronary heart disease, sexual and reproductive disorders, immunodeficiencies, liver damage, stunted growth, aggressive behaviour, susceptibility to connective-tissue injury, and irreversible masculinization."

近年来，为数不断增加业余爱好者和职业运动员已在服用这些药物以促进肌肉发展和增进体力。医学研究已确定促蛋白合成类固醇对仍在发育的年轻人尤其有害，如长期服用会导致包括免疫不全、肝损伤、性器官畸形以及其它反常现象。

But even in the world of serious philosophy, amateurs outrank the professionals.

不过，即便是在如此严肃的哲学领域，业余爱好者的名声也盛于专业人士。

Research is too important to be left to dilettantes and amateurs, and its pursuit should be reserved for those who are qualified for it by aptitude, education, and motivation.

研究太重要所以不能留给那些业余爱好者，而应该成为有天资的、受过教育和有动力的人的追求。谁讲的？谢拉。巨汗ing。

Numerous species exist: the "lost in space" types, so narrow and deep in their technical specialty that they lose track of the real world; the "ax grinders," tirelessly working their pet issues; and the dilettantes, whose conceptual agility and wide-ranging interests allow them to dabble everywhere, with impact nowhere.

无数的各式人群从事的专业太狭窄和技术太高深以至于在真实世界中迷失了踪迹，就象磨斧工乐此不疲地为他们毫无相关的宠物工作，具有灵敏感知和广泛兴趣的业余爱好者到处涉猎，毫无结果。

There is nothing more agreeable and salutary than playing a game which one likes, and the circumstance of doing it badly interferes with the pleasure of no real devotee of any pastime.

玩自己喜欢的游戏是最惬意、最有益的事情，玩不精也不会防碍真正业余爱好者的愉悦。

Philosophy has not always been professionalized and used to be a subject pursued only by amateurs.

哲学并非一直是一门专门学问，它过去常常只是业余爱好者讨论的问题。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。