在一个2～6人的小组里
第二个词是指生物学里面的“间歇性的”
A cathemeral organism is one that has sporadic and random intervals of activity during the day or night in which food is acquired,socializing with other organisms occurs,and any other activities necessary for livelihood are performed.
这一类动物的活动习惯不固定 不是日间活动也不是夜间活动