You need to do this because the WS-Security specification allows attaching multiple tokens for authentication, thus additional metadata is required to identify which is the primary security token.

这样做的原因是因为WS - Security规范允许为身份验证附加多个令牌，这样就需要更多的元数据来识别哪一个是主安全令牌。

youdao

One inherent limitation of the forward converter is that the transformer must be reset during the power transistor off period. Thus, additional reset circuitry has to be used.

但是它的一个固有缺陷是功率晶体管截止期间变压器必须磁复位，因而需要采用附加的复位电路。

youdao

Thus, additional instruments are required.

因此，需要另外的器材。

youdao

If we look at the projected growth in tablets as discussed above, it could very well be that our cellular subscriber forecasts (counting different devices separately) are conservative and thus additional upside to our price estimate for Verizon is possible.

FORBES: Verizon Should Be $37, Much Higher If Tablets Take Off

Thus any additional tax is double taxation.

FORBES: Capital Gains Tax is an Economic Monkey Wrench (2012)

The second way a payroll tax holiday is supposed to stimulate the economy is by making labor less expensive to hire, thus leading to additional hiring, more output, and increased incomes.

FORBES: Doubling Down on the Payroll Tax Holiday Still Won't Create Jobs