Therefore, learners find them vital for understanding. However, Verb-particle constructions are difficult and troublesome for learners to master because of its complexity of meanings and structures.
短语动词的组合力强，数量多，使用广，而语义和语法结构又纷繁复杂，一直是英语学习者不易把握的一个词类。
Therefore, learners find them vital for understanding. However, Verb-particle constructions are difficult and troublesome for learners to master because of its complexity of meanings and structures.
短语动词的组合力强，数量多，使用广，而语义和语法结构又纷繁复杂，一直是英语学习者不易把握的一个词类。
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