青云翻译

The two students to volunteer their time to help others, they spend several hours each week volunteering, this is a very important contribution

The two students have volunteered to take the time to help others, they spend hours each week doing volunteer work, this is a very important contribution

These two students all voluntary flower time helps other people, their each week spends for several hours to be the voluntary worker, this is a very important offer

The two students have been voluntarily take the time to help others, they spend several hours each week doing volunteer work, and this is a very important dedication

The two students have volunteered to take the time to help others, they spend hours each week doing volunteer work, this is a very important contribution