压力引起视网膜内的微血管扭结弯曲，如图中的一个箭头所示，图中的其它箭头所指为视网膜静脉内的“凹陷”，称作动静脉局部缩窄病症。
The pressure causes tiny blood vessels in the retina to kink and twist, which is pointed out by one arrow. The other arrow points to "dents" in retinal veins, a condition known as A-V nicking.
压力引起视网膜内的微血管扭结弯曲，如图中的一个箭头所示，图中的其它箭头所指为视网膜静脉内的“凹陷”，称作动静脉局部缩窄病症。
The pressure causes tiny blood vessels in the retina to kink and twist, which is pointed out by one arrow.The other arrow points to "dents" in retinal veins, a condition known as A-V nicking.
石工射线，作为射线在其它材料里，是主要依于弯曲和剪。
Masonry beams, as beams in other materials, are mainly subject to bending and shear.
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