第二把钥匙要把课准备得生动有趣、丰富多彩，讲课要讲得津津有味。

Key Number Two Prepare interesting, colorful captivating lesson plans and deliver them with gusto.

youdao

第二把钥匙要把课准备得生动有趣、丰富多彩，讲课要讲得津津有味。

Key Number Two Prepare interesting, colorful captivating lesson plans and deliver them with gusto.

youdao