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问题		答案
channel noun; of a river; /ˈtʃænəl/ 开始学习		The part of a river where boats can pass. We have to keep our boat in the channel.
channel noun; connection; /ˈtʃænəl/ 开始学习		A connection between initiating and terminating nodes of a circuit. The guard-rail provided the channel between the downed wire and the tree.
channel noun; storage medium; /ˈtʃænəl/ 开始学习		The portion of a storage medium, such as a track or a band, that is accessible to a given reading or writing station or head. This chip in this disk drive is the channel device.
comprise y=x; /kəmˈpɹaɪz/ 开始学习		If x comprises y, y is all the things that, together, make x. The United States comprises 50 states.
convert noun; /ˈkɒnvɜːt/ 开始学习		A convert is a person who changed their beliefs or religion. countable And we must not discount those who became converts to the new religion.
empirical /ɪmˈpɪrɪkəl/ 开始学习		If something is empirical, it is based on or can be checked by observation or experience. This hypothesis has been challenged on both theoretical and empirical grounds.
extract verb; /ɪkˈstrækt/ 开始学习		If you extract something, you take it out of something else. Computers are becoming more useful in helping us extract useful information from the data.

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Sublist 7