Level 4 - 4 - Spelling Practices

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(1) a. [有用的,经验的,实践证明的] based on experience; useful

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(2) v. [指示,规定] dictate; guide; advise the use of; assert a right; claim

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(3) a. [深刻的] deep; not superficial; far-reaching

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(4) v. [迅速增长,传播,扩散] cause something to multiply or breed; cause to extend to a broader area or larger number

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(5) n. [脉搏,脉冲] beat; rhythm; the rate at which heartbeats;

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(6) n. [寻找,探索] act of searching for something

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(7) v. [批准,认可] approve formally; confirm; verify

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(8) a. [令人满意的,符合要求的] acceptable; good or good enough for a particular need or purpose

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(9) v. [反复摩擦表面] abrade or smooth by rubbing with a sharp or rough instrument; draw forcefully over a surface

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(10) a. [地震的] caused by an earthquake or earth vibration; earthshaking