While the families wait in anguish, multiple probes are underway into why the building fell down.

这些家庭在痛苦中等待时，多个调查正在进行，旨在了解大楼倒塌的原因。

It can do this because, instead of just using one probe, it has multiple probes of different sizes.

它之所以能做到这一点， 是因为它有多个不同尺寸的探针， 而不是只使用一个探针。