我爷爷过去常用Betamax（贝塔格式，一种已过时的录像带格式）录制家庭活动。

My grandfather used to record family events on Betamax.

我在阁楼里找到了一盘旧的Betamax（贝塔格式，一种已过时的录像带格式）录像带。

I found an old Betamax tape in the attic.

贝塔也是一只小耗子。

Beta is also a little mouse.

移动速度快的电子叫贝塔粒子。

The very fast electron is known as a beta particle.

贝塔分泌酶是产生贝塔淀粉状蛋白的关键酶.

Beta is the secretion of amyloid beta protein produced the key enzyme.

如果你把它视为‘另类贝塔'的一种形式，那么它就好比是股票贝塔，甚至比股票贝塔更好一点，”他说。

If you consider it a form of alternative beta, it's really the same or slightly better than equity beta,” he says.

但是, 贝塔系数必须要用过去的数据来估计.

However, estimate of beta is reached with the past data.

较阿尔法粒子而言，贝塔粒子穿透力强很多。

Beta particles penetrate much farther through materials than alpha can.

这些渐近展式是以贝塔分布的级数形式给出的.

These expansions are given in the form of series of beta distribution.

最后我们推导出了时变贝塔情形下的资本资产定价公式。

Finally, we supplied a CAPM formula based on time varying beta coefficient.