The last object within this update we have for you is a PAK trenchsystem, also with an attached bunker.
我们为你呈上的本次更新的最后一样东西就是PAK战壕系统，也是跟一个碉堡连在一起的。
2
The structural and evolutional model of the Mesozoic are-basin-trenchsystem in California has been attracting the attention.
加利福尼亚中生代弧-盆-沟系的构造和演化模式一向为世人所重视。
3
The typical trenchsystem in World War I consisted of a series of two, three, four, or more trench lines running parallel to each other and being at least 1 mile (1.6 km) in depth.