sinking ['sɪŋkɪŋ]

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附加级

n.沉没v.（使）下沉，（使）沉没( sink的现在分词 )

The sun was now sinking, a fiery ball of light in the west. 西边的太阳像一个发光的火球正在下沉。
He was sinking into the Slough of Despond. 他那时正陷入极度沮丧的状态。