What is the grammatical function of the infinitive phrase at the beginning?

句首的不定式短语的语法功能是什么？

同一单元的其他句子

• The complexity of the long sentence often confuses even advanced learners.长句的复杂性常常使即使是高级学习者也会感到困惑。
• Can you identify the main clause in this intricate sentence structure?你能在这个复杂的句子结构中识别出主句吗？
• Despite its length, the sentence maintains a clear logical flow.尽管句子很长，但它保持了清晰的逻辑流程。
• Do not be intimidated by the numerous subordinate clauses in this passage.不要被这篇文章中大量的从句吓倒。
• Understanding the function of each part is essential for parsing long sentences.理解每个部分的功能对于解析长句至关重要。