You don "t have to speak a word of Mandarin to understand that."
你不需要懂普通话就可以理解这点。
So we have t the necessity to carry on a valid distinction for the speech be influenced by local accent, in order to raise the function of mandarin study and train system.
因此我们有必要对受地方口音影响的语音进行有效区分，以便提高普通话学习和训练系统的性能。
The international civil aviation organization doesn"t mandate that Mandarin be the official international language of aviation. They do however, mandate that English is the official language."
国际民航组织没有规定普通话是官方认可的飞行语言。但他们确实规定英语是正式用语了！
The international civil aviation organization doesn"t mandate that Mandarin be the official international language of aviation. They do however, mandate that English is the official language."
国际民航组织没有规定普通话是官方认可的飞行语言。但他们确实规定英语是正式用语了！
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