個人練習用英語長文、しゃべることと歩くこと比較

(Speech seems as natural to humans as walking, and only a little less than natural than breathing.)

Speech seems as natural to humans as walking, and only a little less than natural than breathing.

(But it not really so natural.)

But it not really so natural.

(Speech development is very different sort of thing from learning to walk.)

Speech development is very different sort of thing from learning to walk.

(When a person learns to walk, culture, or social usage, is not a serious factor.)

When a person learns to walk, culture, or social usage, is not a serious factor.

(Each child has the necessary complex biological factors)

Each child has the necessary complex biological factors

(to make all the muscular and nerbous system adjustments.)

to make all the muscular and nerbous system adjustments.

(we term them "biological heredity".)

we term them "biological heredity".

(Most people have the appropriate body parts which are obviously designed for)

Most people have the appropriate body parts which are obviously designed for

(the movements which we call walking.)

the movements which we call walking.

(Children walk, not because older people assist them but because they have a natural desire)

Children walk, not because older people assist them but because they have a natural desire

(to take on all those expenditures of nervous energy and muscular adaptation that result in walking.)

to take on all those expenditures of nervous energy and muscular adaptation that result in walking.

(To be concise, walking is natural biological function of man.)

To be concise, walking is natural biological function of man.

(Yes, walking is much the same all over the world,)

Yes, walking is much the same all over the world,

(but talking varies due to the circumstance of a person's birth and growth.)

but talking varies due to the circumstance of a person's birth and growth.

(Talking is not merely a biological function but the result of living in a particular society.)

Talking is not merely a biological function but the result of living in a particular society.

(Even if you eliminate society, children will still learn to walk, but will they learn to talk?)

Even if you eliminate society, children will still learn to walk, but will they learn to talk?