至此

经过建设者长达五年的艰苦鏖战，这条跨越深海的大桥全线贯通，至此全线正式具备通车条件。

jīng guò jiàn shè zhě zhǎng dá wǔ nián de jiān kǔ áo zhàn, zhè tiáo kuà yuè shēn hǎi de dà qiáo quán xiàn guàn tōng, zhì cǐ quán xiàn zhèng shì jù bèi tōng chē tiáo jiàn.

After five years of hard work by the builders, the entire bridge spanning the deep sea has been completed, and now the entire bridge is officially ready for traffic.