诀窍 (jué qiào): secret; trick; knack; key

Having been a chef for thirty years, he told us that the trick to stir-frying green vegetables is to use high heat and move quickly, so the vegetables stay crisp.

When she first learned violin, she always played out of tune. Her teacher taught her a trick: first play slowly and listen clearly to each note, then speed up.

Many classmates find memorizing vocabulary difficult. Actually, the secret is to review a little every day, not to memorize hundreds at once before an exam.

His secret to courting his girlfriend is remembering the little things she mentions—like what flowers she likes or what foods she dislikes—and then quietly preparing for them.

The secret to this successful negotiation was that we found out in advance what the client cared about most and prepared three different proposals.