Blood donation does more good than harm, so it should be encouraged under scientific instructions.

献血利大于弊，因此应该在科学指导下鼓励人们献血。

youdao

Blood donation does more good than harm, so it should be encouraged under scientific instructions.

献血利大于弊，因此应该在科学指导下鼓励人们献血。

youdao