in groups of three and four

Under the combined criterion of semantics and syntax, nouns in English fall into four categories, with one group of count nouns and three groups of mass nouns.

文章进一步讨论了可数分类词与不可数分类词的区别及划分标准，并尝试对可数分类词下定义，借此把汉语中的可数名词与不可数名词区分开来。

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Chang × Ba × Ben three-way cross pigs at the age of four months were randomly divided three groups and there were 15 pigs in each group.

选择45头4月龄的长巴本三元杂交猪，随机分为3组，每组15头。

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The natural calling songs in the field of different places have basically the same structural levels; they consist of rhythms with repetition frequency of 43-49 Hz, each rhythm with four syllables, each syllable with three pulse-groups and each pulse group with several pulses.

黑蚱蝉野外的自然鸣声具有基本相同的结构层次，都由重复频率为43&49Hz的节奏组成，每个节奏含有4个单音节，每个单音节含有3个脉冲群，每个脉冲群含有若干个脉冲。

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in groups of three and four, is often a big fish in front leading the way, followed by some little fish.

三五成群的，往往是一条大鱼在前边引路，后面跟的是一些小的鱼。

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down the hall, the girls in carol anderson's second grade classroom are sitting in groups of three and four.

沿着走廊走下去，凯洛尔·安德森班里的二年级的女孩们正以三四个人为一组的形式坐着。

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The former based on the relatives of content and form between poetry and drama, to compare these three groups of works in detail with four aspects as follows: music performance, poetic words borrowing, poetic production, profundity goal.

前者以考察戏曲与诗歌在形式和内容上的亲缘关系为基础，从音乐表现、诗词借用、诗云自创、根情追求四个方面细读比较三组文本；

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