A substantial number of mothers with young children are deterred from undertaking paid work because they lack access to childcare.

很多有小孩的母亲找不到人照顾小孩，从而无法从事有薪工作。

《柯林斯英汉双解大词典》

I know I encourage everyone in class to look at a substantial number of sources, but I don't want you to get overwhelmed.

我知道我鼓励班上的每个人看大量的资料，但我不希望你们应接不暇。

youdao

This evidence is far from adequate, however, since over the last decade a substantial number of new industrial facilities that emit these pollutants have been built.

然而，这一证据还远远不够，因为在过去的十年中，已经建造了大量排放这些污染物的新工业设施。

youdao

President Obama and his national security team are considering a request from his new commander in Afghanistan, General Stanley McChrystal, for a substantial number of additional troops.

VOA: standard.2009.10.13

The president is considering several options for his revised Afghanistan strategy, including a substantial increase in the number of troops deployed.

VOA: standard.2009.10.26

This individual will deliver a swing state with a substantial number of electoral votes.

FORBES: Romney's VP Pick: What Makes for a Successful #2?

"I've agreed to do a substantial number of things, whatever I'm asked to do, " Clinton said.

CNN: Bill Clinton predicts big win for Obama

Many cars sold in America already have a substantial number of Chinese components, including engines.

FORBES: Magazine Article