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1·The came to school by twos and threes.

他们三两成群地来到了学校。

2·We went to the station by twos and threes.

我们三三两两地走向车站。

3·They went out hand in hand by twos and threes.

他们三三两两地手拉手出去了。

4·Franklin could count by twos and tie his shoes.

富兰克林已经学会数奇偶数了，他还学会了自己系鞋带。

5·Franklin could count by twos and ties his shoes.

富兰克林已经会数奇偶数了，他还学会了自己系鞋带。

6·The children went on an outing hand in hand by twos.

孩子们两两地手拉着手出去郊游。

7·Franklin could (1)count by twos and (2)tie his shoes.

富兰克林学会了数奇偶数，他还学会了自己系鞋带。

8·At dusk, people like to sit in the meadows by twos and threes about the clear lake, enjoying the cool.

今晚时分，人们喜欢三三两两地坐在明净湖水四周的草地上乘凉。

9·After we worked on adding and subtracting my girls added more Numbers to the line and jumped by twos and threes, working on skip counting.

我们学习了加减法后，孩子们又在数字列上加进许多新的数字，并隔2,3个数字跳来学习跳跃计数。

10·Yin Yuan's house is very simple, not white, is full of color, horsehead walls do not play, in the walls on both sides by twos and threes to fold.

尹源的房子极为朴素，不着粉白，全是土色，马头墙不张扬，在院墙左右两边三三两两地叠着。