Use your own reasoning. Don't stop even if the formula is too large just try to solve it manually.
NASA announces major overhaul of Artemis moon program amid safety concerns, delays: "We've got to get back to basics"
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"This was really an "oh my God" moment," says the scientist behind the findings, Dr Peter Fretwell at British Antarctic Survey, who has worked on Emperor penguins for 20 years.
圖像來源，BBC CHINESE/ TING CHIANG