Word: 时速 (shísù) Traditional: 時速 时速 dictionary entry shísù speed per hour Full dictionary entry for 时速 Example sentences using 时速 2 sentences, showing page 1 of 1. 开车时，请注意你的时速。 Kāichē shí, qǐng zhùyì nǐ de shísù. Please watch your speed when driving. 火车的时速已经超过三百公里了。 Huǒchē de shísù yǐjīng chāoguò sānbǎi gōnglǐ le. The train's speed has already exceeded three hundred kilometers per hour.