7 sentences

1. 米是长度的计量单位。

   mǐ shì cháng​dù de jì​liàng dān​wèi.

   The meter is a unit of measurement for length.

   Source: Dong Chinese Dictionary

2. 这两块木头的长度不等。

   zhè liǎng kuài mù​tou de cháng​dù bù​děng.

   These two pieces of wood are of different lengths.

   Source: Dong Chinese Dictionary

3. 这艘船的长度是30米。

   zhè sōu chuán de cháng​dù shì30 mǐ.

   The length of this ship is 30 meters.

   Source: Tatoeba

4. 这条河的长度大约是五百公里。

   zhè tiáo hé de cháng​dù dà​yuē shì wǔ​bǎi gōng​lǐ.

   The length of this river is about 500 kilometers.

   Source: Dong Chinese Dictionary

5. 请帮我量一下这件衣服的长度。

   qǐng bāng wǒ liáng yī​xià zhè jiàn yī​fu de cháng​dù.

   Please help me measure the length of this garment.

   Source: Dong Chinese Dictionary

6. 工程师对大桥的长度进行了现场实测。

   gōng​chéng​shī duì dà​qiáo de cháng​dù jìn​xíng le xiàn​chǎng shí​cè.

   Engineers conducted an on-site measurement of the bridge's length.

   Source: Dong Chinese Dictionary

7. 老农夫熟练地用步子丈了一下这块土地的大致长度。

   lǎo nóng​fū shú​liàn de yòng bù​zi zhàng le yī​xià zhè kuài tǔ​dì de dà​zhì cháng​dù.

   The old farmer skillfully paced out the approximate length of the land.

   Source: Dong Chinese Dictionary