PHRASAL VERB-ERG （使）有一定上升;（使）有一定提高 If something ratchets up or is ratcheted up, it increases by a fixed amount or degree, and seems unlikely to decrease again. （使）有一定上升;（使）有一定提高 [journalism]
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...an attempt to ratchet up the pressure. [VERB PREP. noun]
加大压力的企图
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He fears inflation will ratchet up as the year ends. [VERB PREP.]
他害怕通货膨胀会在年终更加严重。
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Audiences' expectations are ratcheted up as they are exposed to high-budget productions. [VERB PREP.]
观众看过高成本影片后期望会相应上升。