Semantic repetition is ingeniously removed. The common types of ill sentences are improper word order, improper collocation, incomplete or redundant components, chaotic structure, unclear meaning and illogical. If you encounter uncertain options. It can be measured by the types of sick sentences, and the reasons can be found by dividing the structure of sentences. This sentence is redundant, and the common redundant phenomena are: the combination of "current" and "urgent", "ten" and "cold", "ten" and "disparity", "prevention" and "no longer", "worry" and "excess".