中英释义：
双语例句
志愿者到中心去学习他们在重要一天要履行的职责。
Volunteers come to the centre to learn about what their duties will be on the big day.
重点词汇
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重要
important; great; significant; major; crucial; critical; principal; substantial; fundamental; consequential; material; vital; salient; importance; consequence; significance; weightiness; prominence; emphasize; count; prioritize; highlight the importance of
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一天
day; daily; all-day