Selection and evaluation of treatment methods for benign pancreatic head mass

　　胰頭部良性腫塊治療方式選擇與評(píng)價(jià)

　　Study on Differentiation of Liver Stem Cells into Pancreatic β Cells

　　肝臟干細(xì)胞向胰腺β細(xì)胞分化的研究

　　The children were tearing about in the playground.

　　孩子們?cè)谟螒驁?chǎng)上飛跑。

　　The students swarmed towards the playground.

　　學(xué)生們一窩蜂似地奔向操場(chǎng)。

　　He limped off the playground.

　　他一瘸一拐地離開(kāi)了運(yùn)動(dòng)場(chǎng)。

　　My tooth came out quite painlessly.

　　我的牙一點(diǎn)不疼地掉了下來(lái)。