这款健身软件提供了多种可选的附加功能，比如饮食追踪和个性化训练计划。

This fitness app offers various ___mix-ins like meal tracking and personalized workout plans.

瑜伽课上有几个临时参加的人，他们只是来体验一下。

There were a few ___newcomers in the yoga class who just came to try it out.