volunteer activity的用法和樣例：
例句
- Examples of such local initiatives include crime prevention volunteer activities and safety lectures at schools.
例如包括招募犯罪預防志愿者活動(dòng)以及在學(xué)校里開(kāi)展安全講座等活動(dòng)。 - We encourage all students to volunteer for at least one community activity before they graduate.
我們鼓勵所有學(xué)生在畢業(yè)前至少參與一項社區的志愿者活動(dòng)。
