336 Engine oil should be checked regularly
(A) and replaced regularly.
(B) but does not need to be replaced regularly.
(C) and replaced depending on the brand of oil.

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統計： A(2), B(0), C(1), D(0), E(0) #2214797

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#4418061
引擎油(機油)應該定期檢查(A)並定期更...
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