yuán / dīng / zài / pén / zāi / tǔ / lǐ / jiā / rù / zhēn / zhū / yán / yǐ / gǎi / shàn / pái / shuǐ

园丁在盆栽土里加入珍珠岩，以改善排水。

The gardener added perlite to the potting soil to improve drainage.