As a result , the zddp in motor oils has been steadily reduced .

结果，电动机润滑油中的zddp得以逐步减少。

As the barrier wears away , it is replenished constantly by the zddp in the oil .

阻挡层磨损的同时还源源不断的得到润滑油中的zddp生成的反应物补充。

Also , you can have too much of a good thing . Excessive amounts of zddp can corrode the engine .

还有哇，我提醒你一句物极必反，过量的zddp可是会腐蚀掉你的发动机的。

Carmakers everywhere have pressed suppliers into reducing the amount of zddp in their motor oils .

世界各地的汽车制造商迫使供货商减少电动机润滑油中的zddp含量。

When it left the factory in britain 23 years ago , the 20w-50 blend of mineral oil in your correspondent 's car contained zddp in the above proportions .

你记者朋友的车自23年前从英国工厂出厂以来，车内润滑油20w-50中就含有具有上述比例的zddp。