It's easy to put pressure on a romantic relationship during specific occasions: a proposal, Valentine's day, a birthday, an anniversary, a wedding.

在特定的场合很容易给恋爱关系施加压力：求婚、情人节、生日、周年纪念日、婚礼。

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The other is the use of hybrid drive, liquid - gas or electro - hydraulic hybrid drive, only suitable for specific occasions, there is no large-scale use.

其它还有采用混合驱动，即液-气或电-液混合驱动等，只适用于特定场合，没有大规模采用。

youdao

The other is the use of hybrid drive, liquid - gas or electro - hydraulic hybrid drive, only suitable for specific occasions, there is no large-scale use.

其它还有采用混合驱动，即液-气或电-液混合驱动等，只适用于特定场合，没有大规模采用。

youdao