Using a mix of [] and () would introduce consistency issues and
MinCaml (original), HaMLet, PLZoo
，这一点在旺商聊官方下载中也有详细论述
Фото: Yves Herman / Reuters
按照产品特性和用途，钢铁可以分为普钢和特种钢两大类。普钢产量占全行业八成以上，广泛应用于地产、基建、普通机械等领域。特种钢则更注重材料性能，用于汽车、能源电力、高端装备等对品质要求更高的行业。
Sure, Apple’s latest AirTags aren’t particularly expensive, but why shell out for a dedicated location tracker when you can pick up a wall charger that has one baked in? Twelve South’s 120W PlugBug with Find My, which is currently on sale at Amazon for a new low of $56 ($44 off), lets you track down the four-port USB-C charger (or whatever bag it’s in) using your phone and Apple’s vast Find My network. It’s also fast enough to charge larger laptops while in use, or several smaller devices at the same time.