4 sentences

1. 类似的案例有几十个。

   lèi​sì de àn​lì yǒu jǐ​shí ge.

   There are dozens of similar cases.

   Source: United Nations

2. 这些成功案例有什么共性？

   zhè​xiē chéng​gōng àn​lì yǒu shén​me gòng​xìng?

   What do these success stories have in common?

   Source: CCMatrix

3. 在一些案例中，他们不知道自己在做什么。

   zài yī​xiē àn​lì zhōng, tā​men bù​zhī​dào zì​jǐ zài zuò​shén​me.

   In some cases, they do not know what they are doing.

   Source: CCMatrix

4. 书中收集的20个记录详实的案例只是冰山一角。

   shū zhōng shōu​jí de20 ge jì​lù xiáng​shí de àn​lì zhǐ​shì bīng​shān​yī​jiǎo.

   The 20 well-documented cases collected in the book are just the tip of the iceberg.

   Source: CCMatrix