词性是介词,例如:
1.Medical care is still free at the point of use.医疗保健在实际提供点仍然是免费的。
2.People tend to work hard at this stage of life.人在这个人生阶段往往发奋努力。
词性是介词,例如:
1.Medical care is still free at the point of use.医疗保健在实际提供点仍然是免费的。
2.People tend to work hard at this stage of life.人在这个人生阶段往往发奋努力。