逐年

这项工程必须在规定的逐年内顺利完成。

zhè xiàng gōng chéng bì xū zài guī dìng de zhú nián nèi shùn lì wán chéng.

This project must be completed smoothly in each year according to regulations.

经过持续不断的生态保护，这片自然保护区内的珍稀鸟类数量逐年递增。

jīng guò chí xù bú duàn de shēng tài bǎo hù, zhè piàn zì rán bǎo hù qū nèi de zhēn xī niǎo lèi shù liàng zhú nián dì zēng.

Through continuous ecological protection, the number of rare birds in this nature reserve is increasing year by year.