What does these lines mean "They have many clean words to say"Lineage by Margaret Walker?? Please help me ​

на русском:

Как вы, вероятно, знаете, Маргарет Уокер была афроамериканкой, и ее поэма относится к силе и выносливости ее предков женского пола, которые были рабами.

- Они коснулись земли, и зерно выросло."

В предыдущей строке говорится, что они сеяли семена на вспаханном поле. Очевидно, они сеяли семена вручную (не с машин), поэтому их руки приближались к земле и даже касались земли (земля здесь означает почву, а не планету Земля), и из этих семян зерно росло в полях.

-У них есть много чистых слов, чтобы сказать."

Их мысли и слова были чисты. Они не говорили плохо о людях и не использовали плохие слова.

на английском:

As you probably know, Margaret Walker was African-American, and her poem refers to the strength and endurance of her female ancestors who were slaves.

"They touched the ground, and the grain grew."

The previous line says that they sowed seeds in a plowed field. Obviously, they sowed seeds manually (not using machines), so their hands came close to the ground and even touched the ground (earth here means soil, not planet Earth), and from these seeds the grain grew in the fields.

"They have a lot of clean words to say."

Their thoughts and words were pure. They didn't say bad things about people or use bad words.

Summer is the best season for people. In that time most people have a rest. They can do anything what they want, because for that they have time. Summer is also the best season for pupils, because they have a holidays. They don't need to do such a boring work, they don't need to go to school everyday. Of course summer is also the best season for me. On my last summer holidays i had a lot of amazing days. There is birthdays of my friends. I was too happy doing handmade presents for them. Also somedays my family and I had a picnic with our friends. We played some games like volleyball and even I with my mate tried to catch a fish. Other days I spent with preparing to school and reading books. In conclusion, I can say that at all I enjoyed my holidays and I had great time. I hope you too.

COULDN'T

When I was 6 I couldn't go across the road without my mum

It was impossible to prepare a meal at the age of six

No one was able to stroll down the road at midnight at that age

I think I wouldn't be able to make real friends

Finally, how could I sleep without a lamp?

COULD

When I was six I was allowed to do whatever I wished

I could go to the kindergarten and eat for free

I didn't have to learn hard and have overtime

If I had broken something, I wouldn't have been scolded

Well, I think it was cool not to be beholden to anyone

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