xiào zhǎng / zài / kāi xué / diǎn lǐ / shàng / xùn shì / quán tǐ / xué shēng / yào / nǔ lì / xué xí

校长在开学典礼上训示全体学生要努力学习。

The principal admonished all the students to study hard at the opening ceremony.