3 sentences for 开通 (kāi​tōng — open or activate)

1. 这条新地铁线路明天正式开通。

   zhè tiáo xīn dì​tiě xiàn​lù míng​tiān zhèng​shì kāi​tōng.

   This new subway line will officially open tomorrow.

   Source: Dong Chinese Dictionary

2. 航空公司开通了飞往伦敦的新航线。

   háng​kōng gōng​sī kāi​tōng le fēi​wǎng Lún​dūn de xīn háng​xiàn.

   The airline has opened a new route to London.

   Source: Dong Chinese Dictionary

3. 福厦高铁的开通极大方便了沿线居民出行。

   Fú Xià gāo​tiě de kāi​tōng jí dà fāng​biàn le yán​xiàn jū​mín chū​xíng.

   The opening of the Fuzhou-Xiamen high-speed railway has greatly facilitated travel for residents along the line.

   Source: Dong Chinese Dictionary