zhè / tái / yí / qì / yòng / le / yì / nián / hòu / kāi / shǐ / shī / zhǔn / xū / yào / chóng / xīn / jiào / zhǔn

这台仪器用了一年后开始失准，需要重新校准。

After a year of use, this instrument began to lose accuracy and needs to be recalibrated.