volunteer的意思

volunteer的意思 volunteer的音标和意思 propriety volunteer 啥意思 volunteer什么意思? volunteer什么意思 “volunteer”是志愿者的意思 那“volunteering chances ”怎么解释呢volunteer 后 加“ing”为什么呢 volunteer中文意思和音标 volunteer-firefighter什么意思急 volunteer的音标是什么 求 volunteer的用法, volunteer volunteer both the volunteer teacher and the students are working so hard.the volunteer teacher doesn't like to work there any longer.the students became better and better with the help of the volunteer teacher.的意思 The girl could volunteer in an after-school study program to teach kids的意思 关于volunteer 的英语作文 volunteer与voluntary的区别 有关题目为student volunteer 的作文 volunteer 后面跟动词的什么形式