jar against

1. To validate a file from a signed JAR, a digest value in the signature file is compared against a digest calculated against the corresponding entry in the JAR file.
   在验证一个签名的JAR时，将签名文件的摘要值与对JAR文件中的相应项计算的摘要值进行比较。
2. Owing to the cylindrical surface of piston and jar hole, radial piston pump can be assembled accurately. Compared with the axial piston pump, the radial piston pump is better against impact, moreover, it has longer life, higher cubage efficiency and higher control precision.
   由于径向柱塞泵具有柱塞与缸体内孔均为圆柱面，易达到高精度的配合等结构特点，因此，比轴向柱塞泵耐冲击、寿命长、容积效率高、控制精度高。

verb

1. collide violently with an obstacle
   1. I ran into the telephone pole

   Synonym:    run intobump intobutt againstknock against