如果你居住在亚特兰大-洛杉矶连线以北的地区，冬天太阳过弱不足以提供所需的阳光，所以你需要补充营养。
If you live north of a line between Atlanta and Los Angeles, the winter sun is probably too weak to give you the dose of light you require, so you'll need supplements.
如果你居住在亚特兰大-洛杉矶连线以北的地区，冬天太阳过弱不足以提供所需的阳光，所以你需要补充营养。
If you live north of a line between Atlanta and Los Angeles, the winter sun is probably too weak to give you the dose of light you require, so you'll need supplements.
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