In mathematics, a combination is a selection of items from a set that has distinct members, such that the order of selection does not matter (unlike permutations).

It is a problem that most electroacoustic educators seek to address in combination with the provision of extensive practical composition skills.

The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modern steels that are very rich in alloy content and, therefore, very expensive.

必应词典为您提供combination的释义，美 [ˌkɑmbɪˈneɪʃ (ə)n]，英 [ˌkɒmbɪˈneɪʃ (ə)n]，n. 结合；联合；混合；结合体； 网络释义： 组合；混合性皮肤；合并；

In English we use the word combination loosely, without thinking if the order of things is important. In other words:

Combination是英语中常见的名词，音标为英 [ˌkɒmbɪˈneɪʃ (ə)n]、美 [ˌkɑːmbɪˈneɪʃ (ə)n]，复数形式为combinations。 其核心含义指不同元素的结合或联合体，涵盖结合过程（如化学化合）、组合形 …

"they were a winning combination" an alliance of people or corporations or countries for a special purpose (formerly to achieve some antisocial end but now for general political or economic purposes)

the set or series of numbers or letters used in setting the mechanism of a combination lock

The meaning of COMBINATION is a result or product of combining; especially : an alliance of individuals, corporations, or states united to achieve a social, political, or economic end.

If the order doesn't matter, it is a combination. If the order does matter, it is a permutation. A permutation is an ordered combination. In this case, it doesn't matter what order the people are placed in to fill the …