Level 4 - 4 - Spelling Practices

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(1) n. [污染,玷污] contamination; undesirable state of the natural environment being contaminated

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(2) a. [恰当的,得体的] belonging to one; individual; belonging to the natural or essential constitution; not common or particular

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(3) n. [棉被] bedding made of two layers of cloth filled with stuffing

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(4) a. [理性的,合理的] consistent with; based on; using reason

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(5) n. [长方形] a parallelogram with four right angles

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(6) n. [租金额,租赁,出租] amount paid or collected as rent; the act of renting

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(7) n. [海底,海床] bottom of a sea or ocean

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(8) v. [斜坡,斜面] be at an angle; incline

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(9) n. [主权,统治权] the power of a country to control its own government

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(10) n. [类群,种类] a specific kind of something