问题是其中有不少位组空闲用。

The problem is that there will be many bytes which are never used.

youdao

IP地址中的四个数称为八位位组，因为其二进制形式各有八位。

The four numbers in an IP address are called octets, because they each have eight positions when viewed in binary form.

youdao

为每条消息分配了相同的24位组标识符，且分别具有从1到5的逻辑序列号。

Each of the messages has been allocated the same 24-byte group identifier along with a logical sequence number running from 1 through 5.

youdao

Now if they had taken another set of 446 anorexics, and again June was the month, then there would be some credibility in it.

现在如果他们选择另一组446位女性，然后同样做出六月的结论，这样可能就更可信了。

麻省理工公开课 - 计算机科学及编程导论课程节选