主要有两种
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there are mainly two
以上为机器翻译结果，长、整句建议使用 人工翻译 。
There are mainly two reasons behind this phenomenon.
现象背后主要有两种原因。
youdao
There are mainly two types of teacher training abroad:closed and open.
国外的师资培养主要有两大类型：封闭型和开放型。
Sam: There are mainly two types of programming, manual and computer-assisted.
山姆：主要有两种程序，手工和计算机辅助。
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