观测资料存在明显的年周期变化。
There are obvious yearly periodic variations of baseline data.
卵巢发育、卵巢成熟系数和卵巢壁厚度随季节呈年周期变化。
The ovarian development, the coefficient of maturation in the ovary and the thickness of ovarian wall all showed annual changes.
本文首先给出了北京地区若干跨断层位移测量结果的年周期变化。
This paper gives first the annual periodic variations in the geodetic data obtained from several observation stations for fault displacements in the Beijing region.
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