Because expressing anger towards yourself is both undermining and self harming and it's not very affective.

因为对自己表达气愤是具有潜在破坏和自我伤害的，而且不会很有用。

youdao

Both countries have banned some forms of media seen as harming national security.

VOA: special.2010.08.06

It added that the credit card company's actions were harming both Datacell and Wikileaks.

BBC: PayPal says it stopped Wikileaks payments on US letter

Installing modern and widely-available pollution control technologies can reduce more than 90% of the mercury pollution that is harming both children's health and our environment.

WHITEHOUSE: Energy and Environment Latest News | The White House

QE3 is harming both, so it should be stopped.

FORBES: Bernanke's Blind QE Worship Amounts To Faith-Based Economics