例句與造句

1. in earlier grades, the use of so-called token economies, in which students handle challenging problems and receive performance-based points toward valued rewards, shows promise in raising effort and creativity, the delaware psychologist claims
   這位特拉華心理學(xué)家聲稱，在低年級運(yùn)用這種所謂的象征性獎(jiǎng)勵(lì)機(jī)制，即讓學(xué)生動(dòng)腦筋解決問題，并根據(jù)其表現(xiàn)給予有價(jià)值的獎(jiǎng)賞所需要的分值，有望提高學(xué)生的干勁和創(chuàng)造力。
2. It's difficult to find token economies in a sentence. 用token economies造句挺難的