instrumental

非常重要

Emphasizes a very strong level of importance.

强调非常高的重要性程度。

很关键

Emphasizes a strong level of importance.

强调很高的重要性程度。

完全是器乐

Indicates a piece of music is completely without vocals.

指一首乐曲完全没有人声。

纯器乐

Emphasizes that a piece of music is only for instruments.

强调一首乐曲仅供乐器演奏。

主要是器乐

Indicates a piece of music is primarily without vocals.

指一首乐曲主要没有人声。

主要是器乐

Indicates a piece of music is mostly without vocals.

指一首乐曲大部分没有人声。

主要是器乐

Indicates that the role was important for the most part.

指一首乐曲大部分没有人声。

本质上是重要的

Indicates that the core or fundamental role was important.

表明核心或基础性作用是重要的。

纯器乐

Emphasizes that the role was only a means to an end, with no other function.

强调一首乐曲仅供乐器演奏。

仅仅是工具性的

Suggests the role was only a means to an end, not important in itself.

暗示该角色只是达到目的的手段，其本身并不重要。

是器乐的

To be a key factor in a process or result.

用于说明一段音乐仅由乐器演奏，无人声。

是器乐的

Used to state that a piece of music is made for instruments only, without vocals.

用于说明一段音乐仅由乐器演奏，无人声。

证明是重要的

To be shown to be a key factor after the fact.

事后被证明是一个关键因素。

变得重要

To grow into the role of being a key factor.

逐渐成长为关键因素的角色。

在...中起重要作用

Followed by a noun or gerund (-ing form) to specify the contribution.

后跟名词或动名词（-ing形式）以具体说明贡献。