DOM is generally much easier to master than Simple API for XML (SAX) because it doesn't involve callbacks and sophisticated state management.
通常，DOM比Simple API for XML (SAX)更容易掌握，因为它没有涉及回调和复杂的状态管理。
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"Extraction" is the futuristic speciality of which Dom Cobb (played by Leonardo DiCaprio) is a master—stealing secrets from captains of industry by invading their dreams.