"cartId": "cart_abc123",
两家北美采购钇用于生产涂层的企业高管表示，因拿不到足够原料，不得不短暂停产，其中一家公司还开始拒绝较小及境外客户订单，将有限供应优先保证包括部分发动机制造商在内的大客户。
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But we've learned a lot since then. JavaScript has evolved. A streaming API designed today can be simpler, more aligned with the language, and more explicit about the things that matter, like backpressure and multi-consumer behavior.
[ anyVar isNil ifTrue: anyBlock ] bpattern with: [ anyVar ] -> [:pattern | pattern beVariable ]