Ответ:
<p class="left_margin">Dear Chris,<p class="left_margin">Thank you for your letter. I'm glad that you discussed Russian inventions in the class. <p class="left_margin">Actually, many inventions were made by Russian scientists but as far as they didn't patent them at once, it is hard to prove that they were the first to make these inventions. This happened, for instance, with Popov's radio, Lodygin's electric lamp and even Mendeleev's periodic table. <p class="left_margin">To my mind, it is important to study science at school not only to remember those who moved the progress forward in the past but also to keep moving it in the future. <p class="left_margin">As for Russian scientists who should be famous world-wide, I would add Pavlov, Tsiolovsky, Korolev to the abovementioned Popov, Lodygin and Mendeleev.<p class="left_margin">Keep in touch,<p class="left_margin">Vlad<p class="left_margin">(123 words)<!--rule_body-->
Пояснение. Dear Chris,
Thank you for your letter. I'm glad that you discussed Russian inventions in the class.
Actually, many inventions were made by Russian scientists but as far as they didn't patent them at once, it is hard to prove that they were the first to make these inventions. This happened, for instance, with Popov's radio, Lodygin's electric lamp and even Mendeleev's periodic table.
To my mind, it is important to study science at school not only to remember those who moved the progress forward in the past but also to keep moving it in the future.
As for Russian scientists who should be famous world-wide, I would add Pavlov, Tsiolovsky, Korolev to the abovementioned Popov, Lodygin and Mendeleev.
Keep in touch,
Vlad
(123 words)