If this compass variation or error is not compensated for, a navigator could find himself far off course and in deep trouble.
如果指南针偏差或错误没有正确补偿，一个航海家会发现他自己偏离航程太远和麻烦太大。
The Variation of gravity field in this area may be caused by the crustal deformation or deep transference and fault creep.
重力变化可能是由该区地壳形变、地壳深部质量迁移和断层蠕动共同作用引起的。
The influence factors and strength variation of the deep mixing pile are analyzed, and the application of reflected wave method in the deep mixing pile test is investigated.
对深层搅拌桩强度变化及影响因素进行了分析，并就反射波法在深层搅拌桩检测中的适用性进行探讨。
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