stem back的意思

干背

step back───后退，退后；無意義

steps back───后退，退后；無意義

storm back───風暴回來

set back───推遲；使…受挫折；把…往回撥

bites back───咬回；急忙收回要說的話；抑制

dated back───追溯到；回溯至

dates back───追溯到；回溯至

screw back───退回

shell back───n.老水手

If you've got extra cells of one type and need another, why go all the way back to a stem cell?───如果你有一種類型的多余細胞，還需要另外一種類型的細胞，干嘛還要回到干細胞上去呢？

Cut out a few leaf shapes from green felt and hot glue a small length of the stem wire to the back of each.───綠色毛氈布切割出葉子的形狀，背面粘上一小段鐵絲。

President Bush says he will not allow legislators to roll back limits on stem cell research he set in 2001.───布什總統表示他不會允許國會議員們取消他在2001年對干細胞研究所做的限制。

Pull stem back out to full - open position.