I entered a primary school.

我上了一所小学。

youdao

Yes, they are at a primary school.

是的，他们上小学。

youdao

Historians use a wide range of primary and secondary sources for their research.

历史学家在研究中使用大量的原始资料和二手资料。

《牛津词典》

(Sound) Senegalese educators, government ministers and international partners gathered at a primary school in Dakar Friday to hear what children had to say about their rights.

VOA: standard.2009.11.22

In the early 1990s, Klug had been diagnosed with a rare disease known as Primary Sclerosing Cholangitis (PSC), a rare degenerative liver condition that requires a transplant.

VOA: standard.2010.02.26

Other newcomers who chalked up major losses in recent years include Texas Republican Mike Conaway (who lost a special-election primary for a House seat to now-Rep. Randy Neugebauer), Jindal (who was the Republican nominee for Louisiana governor in 2003), Schwartz (who lost a Democratic primary for Senate in Pennsylvania) and Schwarz (who lost a Republican primary for governor in Michigan).

ECONOMIST: The New Congress

The new rule has two primary components: (a), it requires large traders to register with the SEC through a new form, Form 13H, and (b) it imposes recordkeeping, reporting, and limited monitoring requirements on certain registered broker-dealers through whom large traders execute their transactions.

FORBES: New Large Trader Rules Adopted; SEC Hopes To Better Monitor High-Frequency Trading

There are two things that matter in government-debt dynamics: the difference between real interest rates and GDP growth (r-g), and the primary budget balance as a % of GDP (ie, before interest payments).

ECONOMIST: Daily chart