在非自主的系统中, f是t的显函数.In a nonautonomous system, f is explicitly a function of t.这当然不是林业学的一种自主的发展.This of course was not an autonomous development of forest science.学生们能够自主的解决这些问题.The students are able to solve the problems ...
石墨层中的碳原子相互连接形成碳环。In graphite sheets, carbon atoms bond together in rings.碳化合物氧化后必然会产生二氧化碳。Carbon dioxide is a necessary result of the oxidation of carbon compounds.食物由碳水化合物、蛋白质和脂肪构成。Food is made up of carbohydrates, prot...