In fact, nonverbal communication is a useful tool for communication.
事实上，非语言交际是交流中的重要工具。
Chinese is the basis that we all act on and English is a useful tool for communication.
汉语是我们一切行为思维的基础，而英语则是我们用于交流的工具。
Because a use-case model is defined from a business analyst's view, it provides a level of abstraction that's a useful communication tool for project stakeholders.
因为用例模型是从业务分析师的视角定义的，所以它提供了一种层次的抽象，对项目相关者来说是有用的沟通工具。
While English can be difficult to learn, it is a very useful tool for communication.
尽管英语学起来可能有点难，但它是非常有用的交际工具。
As English learners, we should be more motivated to use English for communication rather than see it merely as a "useful"tool".
作为语言学习者，我们应更加主动地把英语当作“交流工具”，而不是仅把它视为一种“有用”的工具。
English can be difficult to learn, it is a very useful tool for communication.
尽管英语难学，但它对于交流很有用。
English can be difficult to learn, it is a very useful tool for communication.
尽管英语难学，但它对于交流很有用。
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