Group (H I) - Spelling Practices

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(1) n. (住家留学生) students visiting a foreign country to study, board with a local family at an affordable price
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(2) n. (氢) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas
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(3) n. Syn. urgent(及其重要,及其关键) having power command or control; critically importance; some duty that is essential and urgent
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(4) n. Syn. incentive; stimulus(动力,动机) incentive; stimulus; force or energy associated with a moving body
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(5) v. Syn. demand; force; inflict(强加于,施加影响) demand; force; compel to behave in a certain way
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(6) v. Syn. extemporize(临时准备,即席创作,现编) compose, perform, or do something with little or no preparation
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(7) v. Syn. motivate(煽动,刺激,驱使) arouse to action; motivate; induce to exist
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(8) v. Syn. cause; arouse(招致) bring upon oneself; become liable to; acquire or come into
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(9) a. (通过空气传染的,有传染性的) contagious; contaminating
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(10) v. Syn. impose; cause(造成,遭受(痛苦,损伤)) impose something unpleasant; cause