Where were you on the night of April 15?

April 15 is the deadline for filling individual income-tax returns.

个人所得税申报归档的最后期限是4月15日.

The matrix is defined as the reciprocal of A.

该矩阵定义为A之逆矩阵.

The aim of this chapter is to develop properties of the inverse.

本章的目的是要开发逆矩阵的性质.

They may be conveniently expressed in the following matrix form.

它们可以方便地表示成下列矩阵形式.

We now omit the prime on the matrix elements.

我们现在把各矩阵元素上的一撇略去.

This can be extended to n X n tridiagonal matrices.

这可以推广到nXn三对角线的矩阵.

This matrix is symmetric and banded , the band being equal to four.

这个矩阵是对称的且是带状的, 带宽等于四.

These are matrices that may be intersected.

这是一些能分割的矩阵。

Triangular matrices, in particular, are usually quite tractable.

特别地, 三角矩阵常是十分易于驾驭的.

We were in a buoyant mood after winning our match.

我们赢了比赛,心情很振奋.

He's in a prickly mood.

此刻他的心情容易动怒.

She was obviously in a mood.

她显然情绪不佳。

She found him in a meditative mood.

她见他正在沉思。

She was in a bullish mood about the future of the company.

她对公司的未来充满信心.

There are three kinds of mood in English: the indicative mood, the imperative mood and the subjunctive mood.

在英语中有3种语气: 陈述语气, 祈使语气和虚拟语气.

She was in a buoyant mood and they were looking forward to their new life.

她心情愉快，他们正在憧憬未来的新生活。

The mood of the meeting was against him.

大会的气氛是反对他的.

Her mood was blacker than ever.

她的心情从未如此低落过。

She laughed her good mood when she saw her mother.

她看到母亲时,以笑表示了她愉快的心情.

I walked on in a reflective mood to the car.

我心事重重地向车子走去。