人々は人間しか言語を使えないと以前は考えていた。の英語

People used to think that only humans could use language.

Ability to talk distinguishes human beings from animals.

Man is the only animal that can speak.

It is language that distinguishes man from beasts.

Only human beings are capable of speech.

Man differs from animals in that he can think and speak.

Man is the only animal that talks.

Man is the only animal that possesses language.

Men differ from brutes in that they can think and speak.

Man has the gift of speech which no animal has.

Man differs from animals in that he can speak and think.

Human beings are different from animals in that they can think and speak.

Humans are not designed to be able to speak any language.

Human beings differ from animals in that they can think and speak.

Only human beings have the ability to use language freely.

Man alone has the gift of speech.

People can talk but animals cannot.

Men differ from animals in that they can think and speak.

Man alone can speak

Man is the only creature that can speak.

Human beings are different from animals in that they can think and speak.

Man is the only animal that can talk.

Men differ from animals in that they can think and speak.

Man is the only creature that can speak （＝No other creature can speak）

She thinks that language is man's greatest invention.

Men differ from other animals in that they can think and speak.

No one knows for certain when the human race began verbal communication.

Man is above all things the talking animal.

Man is different from animals in that he has the faculty of speech.

I think everybody should learn another language.