2 sentences

1. 这艘船的时速是二十节。

   zhè sōu chuán de shí​sù shì èr​shí jié.

   The speed of this ship is twenty knots.

   Source: Dong Chinese Dictionary

2. 这列高铁的最高时速可达350公里。

   zhè liè gāo​tiě de zuì gāo shí​sù kě dá350 gōng​lǐ.

   The top speed of this high-speed train can reach 350 kilometers per hour.

   Source: Dong Chinese Dictionary