今日四级必背单词：accumulate / acknowledge / adapt

accumulate
/əˈkjuːmjəleɪt/
v. 积累，堆积
同义词：gather, amass

• Prices tend to rise as demand continues to accumulate over time.
  随着需求不断积累，价格往往会上涨。
• Dust quickly accumulates if you don’t clean the room regularly.
  如果不定期打扫，灰尘会很快堆积起来。

acknowledge
/əkˈnɒlɪdʒ/（英）/əkˈnɑːlɪdʒ/（美）
v. 承认；致谢，确认收到
同义词：admit, recognize

• He refused to acknowledge that he had made a mistake.
  他拒绝承认自己犯了错。
• Please acknowledge this email once you have received the documents.
  收到文件后请回复邮件确认。

adapt
/əˈdæpt/
v. （使）适应；改编
同义词：adjust, accommodate

• Animals must adapt to changes in their environment to survive.
  动物必须适应环境变化才能生存。
• The novel was adapted for a television series last year.
  这部小说去年被改编成了电视剧。