19世纪的规律是：战争结束，债务偿还。1913年之后，这个规律消失了。原因是什么？
The Nothing Phone 4a Pro also has a very different design. Instead of a plastic chassis, it has a metal unibody, which probably allowed Nothing to reduce its thickness to 7.95mm (this makes it the thinnest Nothing phone ever). It also has a different camera arrangement on the back, and a Glyph Matrix instead of bar, a circular arrangement of 137 mini-LEDs that is now basically a tiny display on the phone's back. It's not new: We've seen it on the last year's flagship, the Nothing Phone 3, but it's nice to see the company bring it to its mid-range phone.
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def value(self):
During last year's MWC, Nothing launched two smartphones, the Nothing 3a and Nothing 3a Pro. Both were slick-looking, fairly affordable mid-rangers with big displays, big batteries, and a couple of Nothing-specific software features.