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。

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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。

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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。

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Instead, the delegations agreed to allow separated Kashmiri relatives and humanitarian assistance to begin to cross through several points in the line of control, starting on November 7th.

NPR: India, Pakistan's Post-Quake Peace in Jeopardy

He pulled away from Team USA anchor Ryan Bailey about half way through the final leg to cross the line in a time of 36.84 seconds, beating the previous record of 37.04 seconds.

CNN: STORY HIGHLIGHTS

Visser, who had started ahead of Andrew Turnbull, powered his way through a couple of tackles to cross the line and Paterson made no mistake with his kick.

BBC: Ulster 13-16 Edinburgh