本合同有效期从合同生效之日算起共10年，有效期满后，本合同自动失效。

The contract shall be valid for 10 years from the effective date of the contract, on the expiry of the validity term of contract, the contract shall automatically become null and void.

youdao

是从购买之日算起12个月吗？

Is it 12 months from the date of purchase?

youdao

电池的保质期从出货之日算起为半年。

The period of warranty is half a year from the date of shipment.

youdao