That is to reveal the trump card of teacher .

我是教过这个班级的先届老师和他们最初级的改良者。我痛斥那些拙劣的教学方式，以至于今天我们的孩子们陷入吸毒，离婚和其他使他们不能专注于学习的困扰。但是，当我每次走进教室都会发现的是，在一名老师期望可以引起学生的注意之前，他已经吸引了学生的注意，而不管面临什么样的干扰。有很多方式可以做到这一点，并且老师们在教学风格方面还亟待改进。然而，如果教学风格不能做到这点，还有另一种方法使你成为教室里的导引者，那就是使用教师的杀手锏。

Its trump card is to use its massive size to frighten hunters from their kill.

它们的王牌就是用他们巨大的体型吓退其他的捕猎者们。

They knew he would be a handful. Social media, though, was his trump card. Almost all Indonesians now had mobile phones.

他们知道苏托坡很难对付。但是，社交媒体是他的王牌。几乎所有的印度尼西亚人现在都有手机。

Keyence's second trump card is its approach to personnel.

Keyence 的第二张王牌是其对人员的态度。

At the heart of the power grid, Liaoyuan revealed his trump card.

电网核心，燎原亮出王牌。

So Bill played his trump card: Money!

于是比尔拿出最后一手：钱！

The promise of tax cuts proved, as always, to be the Republican Party’s trump card.

【card】一如以往，承诺减税是共和党的王牌。

His freedom to trot in and out of the ducal splendours of Stanworth was his trump card.

他可以自由进出斯坦沃斯公爵的豪宅， 这是他的王牌。

After a long and desperate struggle, the American Minister had trumped their best card and won the game.

经过长时间的殊死搏斗， 美国公使打出了他们最好的牌， 赢得了比赛。

In these conditions to give away the trump card to those who continue and who called for external military intervention is simply utter folly and does not fit any logic at all.

在这种情况下，对那些继续呼吁进行外部军事干预的人打出王牌是完全预存的，也不符合任何逻辑。