4000 Duolingo (S) - Spelling Practices

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(1) n. (公共,环境)卫生,卫生设施 health; hygiene; application of measures designed to protect public health; disposal or recycling of waste

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(2) n. 讽刺作家 a humorist who uses ridicule and irony and sarcasm

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(3) a. 猩红的,鲜红的 bright red; of a brilliant red color

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(4) n. 方案 an elaborate and systematic plan of action; chart or outline of a system or object

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(5) n. 螺丝钉,钻进,拧紧 cause to penetrate with a circular motion; fastener with shank and slotted head

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(6) ad. 安心地,安全地 in a manner free from fear or risk

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(7) v. 消尖,使敏锐,使敏捷 make pointed; make sharp or sharper

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(8) v. 淤泥,淤沙,沉渣 mud, clay, or small rocks deposited by river or lake

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(9) n. 骨架,纲要 framework; an internal supporting structure that gives an artifact its shape

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(10) n. 怠慢,斥责,侮辱 almost no; very little; deliberate discourtesy