Hel的音标：...

It was concluded that Tpo may be a possible autocrine factor of HEL cells.实验结论提示Tpo可能是HEL细胞的自分泌因子.He often hel me with maths when I have difficulty in it.当我学数学有困难时,他经常帮助我.Minute Beep is the tool that hel you to reduce ca...

abbr.helicopter 直升机...