Various approaches have been used to improve the performance of adapted indigenous stock, including cross-breeding and upgrading through back-crossing with improved breeds, and within-line selection.
已有多种方法被用于提高地方良种的性能，包括杂交育种，以及通过与良种的回交和品系内选育进行的品种改良。
In calculation models of cutting volume for dredging project, the cross section is usually a special one through survey points, and the curve of the river bed is assumed to be a line or a polyline.
通常疏浚工程中挖槽土方量计算模型的河床横断面是通过测量点的特殊断面，该断面轮廓曲线假定为近似直线或折线。
Topology line through the built-in switch or topology star through external switch, and this coupler has performance of auto-negotiation, auto-cross and full-duplex.
可通过内置交换机进行线形布线或外置交换机进行星型布线，并且具有自动协商、自动交叉和全双工的性能。
In Tender A2 of right line of Xiamen Xiang 'an subsea tunnel, weathered slot F1 is needed to cross through.
厦门翔安海底隧道右线a 2标需要穿越F1风化槽段，制定切实可行的穿越F1风化槽段施工方案显得尤其关键。
Thankfully he's got two guys who can show him the way, who can help through when things get really difficult and when it's time to come back they can help him cross the white line again without fear.
感谢上帝队里还有两个过来人，可以在最艰难的时刻扶他一把，当他身体条件恢复，可以付出的时候，帮他克服恐惧，重返球场。
Locals cross a railway line which runs through the slum.
当地人跨铁路线穿过贫民窟。
Locals cross a railway line which runs through the slum.
当地人跨铁路线穿过贫民窟。
应用推荐