I acknowledge that we would need an extension of time.

我承认我们需要申请延期（ an extention of time）。

youdao

We request that you grant us an extension of time.

我们请你们把时间给我们延长-点。

youdao

The defendant applied for an extension of time in which to serve her defense.

被告申请延长为她辩护的时间。

youdao

The University of Illinois Extension advises getting bare-root roses as close to planting time as you can.

VOA: special.2010.06.15

Three times in recent weeks, Republicans have used parliamentary tactics in the Senate to block the extension of benefits, angering the president at a time when he is trying to move this and other legislation through Congress before the congressional recess.

VOA: standard.2010.07.19

In some circumstances, taxpayers get an extension of time to file without having to ask.

FORBES: Not Ready To File Your Taxes? Extension Form, Details Available

Remember that an extension is an extension of the time to file and not an extension of time to pay.

FORBES: What Romney and I Have in Common With More Than 10 Million Taxpayers

National took advantage of the extension of time to pay the taxes.

FORBES: Executive of Bankrupt Airline Liable for Millions in Excise Tax