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Friday, September 4, 2026 · 803 words · 6 minutes · 0 reads · Advanced

Article details

This graded Chinese reading practice article combines authentic reading with optional pinyin, translation, audio, vocabulary, and comprehension practice.

Author
HSK Read
Published
Friday, September 4, 2026
Updated
Sunday, September 20, 2026

Read

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网球与密封罐:不为人知的设计奥秘

Reading questions and answers

According to the article, how is the sealed environment of the tennis ball can achieved?

Injecting pressurized gas into the can

According to the article, what is the maximum time unopened canned tennis balls can be stored?

Two years

According to the article, why do larger balls like footballs and basketballs not require sealed cans?

Because they have valves allowing for additional inflation

According to the article, why do solid-core balls like baseball and golf balls not need sealed cans?

Because their dense structure doesn't require inflation

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