Writing, as one form of speech activity, is a complex psychological process.

书写作为一种言语活动形式，是一个复杂的心理过程。

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Lots of researches show that any brain damage will impair conscious speech activity and cause speech deficit.

大量研究表明，每一种脑损伤都会破坏有意识的言语活动，导致言语障碍。

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During that time, says Merzenich, as the patients listen to and repeat words they hear, their brains create new activity patterns to represent pieces of meaningful speech, thus teaching themselves to hear again.

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In his speech, Bush acknowledged that climate change is real and that human activity is a factor.

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While the First Amendment to the U.S. Constitution protects the free speech rights of ordinary citizens, a Defense Department rule prohibits service members from engaging in some forms of political activity.

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