Definitions

[1] 艾杰克斯铜锡铅轴承合金

[2] 亚甲斯炸药

1. On the client side, very time-consuming operations should run asynchronously so as to avoid freezing the browser. The best example is the operation of Ajax.
   在浏览器端，耗时很长的操作都应该异步执行，避免浏览器失去响应，最好的例子就是 Ajax 操作。
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