Through changing 2-3 tree, a new data structure is formed-BT.

通过对“2-3树”的改造，形成一种新的数据结构；即平衡树（BT）。

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The concentrations of main pollutants, CO 2, CO, formaldehyde, IP, BT, HS and radon, met the National Hygiene Standard.

甲醛、IP以及BT、HS含量、氡等主要污染物均未超出国家有关卫生标准的限定值。

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So let me go back now to this expression, x=at^/2+c+bt.

让我们再回到这个式子,x=at^/2+c+bt

耶鲁公开课 - 基础物理课程节选

In that case, y will be -gt^/2+c+bt.

在这个情况下y=-gt^/2+c+bt

耶鲁公开课 - 基础物理课程节选

The day's other leading performers included BT - up 2.6% - and United Utilities, which rose 2.5% after an upgrade of the sector by Goldman Sachs and recent excitement surrounding the overseas bid interest in rival Severn Trent.

BBC: News - London shares reach 12-year high

In an email interview before the verdict, Newzbin 2 threatened to break BT's filters.

BBC: BT ordered to block links to Newzbin 2 website

But come October, when an order is issued, it will be taken to apply not just to BT but to all the major ISPs, who got a letter before the case asking them to act against Newzbin 2.

BBC: Newzbin: What happens next?