There was always too much distance between an initial in-classroom training and your two year recertification.

初的培训和你两年的重新认证之间总是有太多的距离。

The airline said the decision to resume using the model came after intense recertification by regulators worldwide.

该航空公司表示，在得到球监管机构的严格重新认证后决定恢复用该机型。

However, this would have significantly changed its aerodynamic profile, forcing pilot recertification and retraining.

然而，这会显着改变其空气动力学特性，行员重新认证和再培训。

It can be used for up to 30 years and Tomahawks that haven't been used come back after 15 years for recertification and upgrades.

它可以用长达30年，战斧式导弹在15年后回来进行重新认证和升级。