My first real failure was in 1966 in the 6th grade.

我的第一次真正失败发生在1966年，我上6年级时。

youdao

Suitable to high grade real estate, business facility and leisure entertainment.

适宜高档房地产、业设施和休闲娱乐业开发。

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Even if so, let his real strenght enhance a grade, achieved six classes first grade.

即使这样，也让他的实力提升了一个品级，达到六级上品。

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The real pressure to introduce another grade was from politicians, she suggested, who wanted to defend themselves against accusations of exams getting easier.

BBC: Top head attacks grade change stress

All of them got into trouble with their investment portfolios last year, particularly in commercial real estate, mortgage paper and low-grade corporate bonds.

FORBES: Magazine Article

This assumes that in retirement the couple switches to a lower-risk, conservative portfolio of government and high grade corporate bonds earning on average a real return of just 3%.

FORBES: Social Security Personal Accounts And The Financial Crisis