定向基为化学术语，英文名为 orientating group，即同定位基。
位于阿尔·伯克基的波音定向能量系统研发了移动、拖车式的MATRIX，整合了现有测试范围的雷达。
Boeing Directed Energy Systems, based in Albuquerque, developed MATRIX, a mobile, trailer-mounted test bed that integrates with existing test-range radar.
关于加成的定向问题，可以一直追溯到自由基化学的起源。
The problem of orientation of addition goes right back to the beginning of freeradical chemistry .
在晶须增韧陶瓷基复合材料中，晶须定向排布有望提高晶须的增韧和补强效果，从而提高复合材料的力学性能。
In the whisker-toughening ceramic matrix composites, oriented whisker alignment is hoped to improve whisker reinforcing and toughening, thus improving the mechanical properties of the composites.
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