àn / zhào / dāng / shí / de / fǎ / lǜ / nán / zǐ / nián / mǎn / èr / shí / suì / cái / suàn / chéng / dīng

按照当时的法律，男子年满二十岁才算成丁。

Under the laws of the time, a man was considered an adult only after turning twenty.