4 sentences

1. 事故发生时，不少旁人在围观。

   shì​gù fā​shēng shí, bù​shǎo páng​rén zài wéi​guān.

   When the accident occurred, many bystanders were looking on.

   Source: Dong Chinese Dictionary

2. 很多人在街上围观这场事故。

   hěn​duō rén zài jiē shàng wéi​guān zhè cháng shì​gù.

   Many people gathered on the street to look at the accident.

   Source: Dong Chinese Dictionary

3. 广场上聚集了大量围观的群众。

   guǎng​chǎng shàng jù​jí le dà​liàng wéi​guān de qún​zhòng.

   A large crowd of onlookers gathered in the square.

   Source: Dong Chinese Dictionary

4. 这场庆典的声势极浩，吸引了数万人围观。

   zhè cháng qìng​diǎn de shēng​shì jí hào, xī​yǐn le shù​wàn rén wéi​guān.

   The scale of the celebration was grand, attracting tens of thousands of spectators.

   Source: Dong Chinese Dictionary