1、preparation

准备；预备；筹备

Rub the surface of the wood in preparation for the varnish.

打磨木头的表面，为刷清漆做准备。

Few things distracted the Pastor from the preparation of his weekly sermons.

几乎没有什么事情能使牧师在准备每周的布道时分神。

准备工作；预备工作；筹备工作

The United States is making preparations for a large-scale airlift of 1,200 American citizens.

美国正在为运送1,200名美国公民的大规模空运做准备。

Final preparations are under way for celebrations to mark German unification.

纪念德国统一的庆典活动正在做最后的准备工作。

（食物、医药、化妆品的）制剂，配制品

anti-ageing creams and sensitive-skin preparations.

抗衰老面霜和敏感性皮肤适用的护肤制剂

2、friction

矛盾;不和;争执

Sara sensed that there had been friction between her children.

萨拉感觉到她的孩子之间有过争执。

The plan is likely only to aggravate ethnic frictions.

这一方案很有可能只会加剧种族冲突。

摩擦力

The pistons are graphite-coated to reduce friction.

活塞上涂了一层石墨以减小摩擦力。