zǎo / qī / de / wō / pēn / fā / dòng / jī / zào / shēng / jiào / dà / rán / yóu / xiào / lǜ / yě / bù / gāo

早期的涡喷发动机噪声较大，燃油效率也不高。

Early turbojet engines were quite noisy and were not very fuel-efficient.