很多人积极投身于红十字会等服务组织的协助工作当中。
Many people are active in helping service organizations (组织) like the Red Cross.
他说这大家正在积极投身于这一竞赛。
国庆节快到了，他们积极投身于庆祝活动的组织工作。
The National Day is coming; they have thrown themselves into the organising of Celebration Activities.
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