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0 · 25/02/18 10:00:30
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Whales have been hunted for their meat and oil for centuries. In the 18th and 19th century, whaling became an industry. As time went on, whaling fleets caught more whales than the animals could reproduce. By 1930, 50,000 whales were killed every year. Mọi người cho em hỏi cụm từ As time went on nghĩa là gì ạ và nếu thay bằng cụm từ as time went by có được không ạ