extracted

As I watch her chase after a squirrel, throwing her whole being into the here-and-now of an exercise that has never once ended in victory, she reminds me, too, that no matter how harsh the present or unpredictable the future, there's almost always some measure of joy to be extracted from the moment.

看着她追逐松鼠，全神贯注投入到当下这项绝不会以胜利告终的活动里时，我也受到了启发：不论现实多么艰难、未来多么迷茫，人几乎总有办法能从眼前情景中获得快乐。

Four geometric attributes, such as chain code, convex/ concave, circular/ rectangular, and open/ closed attribute, were extracted from a scanned point set and presented to the ANN module for feature recognition.

该算法先从扫描点云中抽取四大基本几何属性：方向、凹/凸性、圆/直性、开/闭性，接着输入点的几何属性到人工神经网络（ANN）进行特征识别。

CONCLUSIONS HBV DNA extracted from clinical samples were directly detected using PNA biosensor and PCR amplification was successfully bypassed.

结论利用肽核酸生物传感器成功地绕过了PCR扩增而直接检测出了临床标本中的HBV基因组DNA。