Echogenic
[医]发生回波的
🗣️ 情景例句
You never know what you can do till you try.
除非尝试，否则你永远都不知道你有何价值。
Fire and water are good servants, but bad masters.
水火是忠仆，造灾成元凶。
while our own compulsory school attendance became law in Germany in 1642,
而我们的义务教育成为法律在德国是在1642年，