Tip: For spark in a backlit portrait or silhouette, try compositions that include the light source. This can drive your meter crazy, though, so bracket your exposures.
小提示：在拍摄背光照明的人像或剪影时，试着将光源纳入构图中，但是这样会导致测光表读数不准，因此可以尝试使用包围曝光法。
Tip: before equipment must be good backup important data of the original system. Transfer of personal data and backup hard drive in advance.
提示：设备前请必须备份好原系统的重要数据。主张提前转移个人资料并备份硬件驱动。
The shading network connected to thread USES an expression to drive the displacement threading and a ramp to prevent the threading from appearing on the head and the tip of the screw.
这个材质网络用一个表达式连接到螺纹去驱动螺纹的置换和一个渐变，去防止螺纹在顶端出现和在螺纹尖部出现。
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