Don't argue with Professor Smith; you are not old enough to cross swords with him.

不要同史密斯教授争了，同他交锋，你还嫩了点。

youdao

By their nature, they are less likely to cross swords (claws?) with a group of good-aligned PCs.

透过他们的本性，他们很少会穿过剑(爪吗？)由于一组好调整好的PC。

youdao

To obtain the Cross with Swords an individual had to be involved in front line combat, and the degree of experience and rank determined whether the Cross was bestowed in Bronze, Silver or Gold.

获得佩剑十字勋章必须是个人参与了在前线作战，并且有相当的经历和意志坚定，在规定和敌人战斗在什么程度分别颁发铜质，银质或黄金十字勋章。

youdao

Regardless, they are sure to cross swords at some juncture, adding further spice to a match of extremely high stakes.

BBC: Brown & Diouf re-match adds spice to Old Firm derby

If confirmed, he's likely to cross swords again with GOP leaders in a new round of budget and debt-ceiling talks that were already likely to be contentious.

NPR: THE RESET: Obama Picks Familiar Faces For 2nd Term

In fact, the president can afford to cross swords with the GOP troglodytes, but what he can't afford is to alienate his own Democratic party base, which has overwhelmingly rejected the war.

BBC: US in Afghanistan failure warning