"maintain" "sustain" "keep"表示“保持，维持”的区别
"maintain"ismorelikekeepingitinitsoriginalcondition,ortakingcareofitwellwhileholdingit.“maintain”更偏向于保持它原来的状态，或者在拥有它的时候好好照...
"maintain"ismorelikekeepingitinitsoriginalcondition,ortakingcareofitwellwhileholdingit.“maintain”更偏向于保持它原来的状态，或者在拥有它的时候好好照...
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