医生正在给病人注射疫苗。

The doctor is ___injecting the patient with a vaccine.

教练建议在训练计划中注入一些创新元素。

The coach suggested ___injecting some innovative elements into the training program.

她在演讲中巧妙地加入了一些个人故事，让内容更加生动。

She skillfully ___injected some personal stories into her speech to make it more engaging.