zhè / cì / yǎn / jiǎng / zhǐ / shì / tā / xiǎo / shì / niú / dāo / zhēn / zhèng / de / tiǎo / zhàn / hái / zài / hòu / miàn

这次演讲只是他小试牛刀，真正的挑战还在后面。

This speech was just a small display of his abilities; the real challenge is still ahead.