医生建议每周注射一次来治疗这种疾病。

The doctor recommended weekly ___injections to treat this condition.

政府为振兴经济注入了大量资金。

The government provided a substantial ___injection of funds to revive the economy.

这种肥料含有特殊成分，能让植物长得更快。

This fertilizer contains special ___ingredients to make plants grow faster.