异步单向调用中的本地时间阴影之间的重叠。
Overlap between the local-time shadows in the asynchronous one-way invocation.
他宣称自己在作为子孙的责任和父亲的阴影之间左右为难。
He declared himself to be "torn" between his obligations to posterity and to his father's shade.
大光源就是所谓的柔光，也就是亮部与阴影之间的过渡比较柔和。
This is generally because a larger light source will create a smoother transition between light and shadow, or what you might call softer light.
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