Group (E F) - Spelling Practices

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(1) n. (回声,发出回声,重复) sound reflected from an opposing surface and repeated to the ear; repetition of a sound
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(2) n. (俭省节约的,经济的) efficient use of resources; reduction in cost; specific type of economic system
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(3) n. (弹性 伸缩力) tendency of a body to return to its original shape after it has been stretched or compressed
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(4) n. (电工) one whose occupation is the installation, maintenance, repair, or operation of electric equipment and circuitry
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(5) a. Syn. prominent; high; lofty(高的) standing out above other things; high in rank, office, or worth
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(6) v. Syn. stress; underscore; highlight(强调,着重) stress; underscore; utter or pronounce with a particular stress of voice
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(7) a. Syn. everlasting; eternal(无止境的) without end; having no end or conclusion; perpetual; interminable
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(8) v. (撤退,撤离) make empty; empty out; remove contents of
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(9) a. Syn. modeled; ideal(出色的,典范的) serving as model; outstanding; typical