The company was formed by merging three smaller firms.

公司是由三家小公司合并组成的。

《牛津词典》

Often they "trade up", leaving riskier, smaller firms for larger and more stable firms.

他们经常“升级”，离开风险大、规模小的公司，跳槽到更大、更完善的公司。

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Smaller firms have far fewer choices.

小型企业却没有什么选择。

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Smaller firms subject to extraordinary risks need to be able to afford proper e-discovery solutions.

FORBES: Connect

There are also a number of smaller firms looking to capitalize on the data explosion.

FORBES: Data of Reckoning

Smaller firms are to be promoted on campuses to highlight careers outside traditional large graduate recruiters.

BBC: Career women handshake