This species of bird is decreasing in numbers every year.

这种鸟的数量在逐年减少。

《牛津词典》

That's because there is safety in numbers.

那是因为数字会带来安全感。

youdao

It is difficult for numeric people to keep track of the change in numbers even when the total is very small.

即使数据总数很小，数据工作者也很难追踪数字的变化。

youdao

For reasons unknown, big bluefin started showing up in numbers off North Carolina about eight years ago.

FORBES: The Young Man And the Sea

Mr. JAIME CONTRERAS (Rally Organizer): We have shown, as a movement, power in numbers.

NPR: Immigrant Marches Planned for Labor Day Weekend

Members are concerned by a sharp drop in numbers in recent years, against growing demand.

BBC: An electrician and his apprentice