最重要的是，现在大多数的3D食品打印机都受到限制，只能打印干燥的食材，因为肉类和奶制品很容易变质。
On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad.
尽管在飞机等干燥环境中，飞行的过程中很容易滋生传染病，但由于飞机上使用了空气过滤器，因此你在飞机上得病的风险实际上很低。
Although in-flight infections thrive in dry environments like airplanes, your risk of getting sick from an airplane is actually low because of the air filters used.
在干燥的天气里将点燃的香烟扔在树林里容易失火。
A cigarette thrown into the woods in dry weather may catch [start] a fire.
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