cross hair
参考词典中cross hair的常规释义：
基本释义
- 十字瞄准线，十字丝，十字准线，叉丝
英英解释
1个名词解释
- either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration
[同] cross hair, cross wire
[例]- he had the target in his cross hairs
点击查看……- either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration
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