因此，持续制动应激，大鼠ves表现为先下降后上升。
Thus, persistent immobilized stress caused an initial decreased VES which was followed by subsequent increase in VES.
MDA含量与SOD活性存在负相关关系，随着土壤镉浓度的增加，MDA含量先下降后上升。
There was a negative correlation between SOD activity and MDA content, and MDA content declined at low Cd level and increased at high Cd level.
其中，WGA受体和ECL受体在各组神经管头部、体部和尾部表达的总体趋势均是先下降后上升；
The general tendency of expression of WGA and ECL receptors in the neural tube at different developmental stages was gradually decreased and then gradually rose.
保护性物质还原性抗坏血酸（ASA）含量上升，还原性谷胱甘肽（GSH）含量先下降后上升；
The contents of ascorbic acid (ASA) increased, the contents of glutathione (GSH) increased after slightly decreased.
结果表明：随玻璃加入量的增加，复合材料的抗拉强度、硬度均先上升后下降，磨损量先下降后上升。
The results indicate that with the increase of glass content, the tensile strength and hardness of the composite increases at first, then decreases.
随着淹水时间的增长，脯氨酸含量、MDA含量和SOD活性均先下降后上升，叶绿素含量则逐渐降低。
With increasing inundation duration, the leaf proline and MDA contents and SOD activity increased after an initial decrease, while the leaf chlorophyll content decreased gradually.
聚合物的熔点随联苯含量的增加呈先下降后上升的变化规律，体系在联苯含量为20%处出现最低共熔点。
With the increasing of BP molar fraction, the melting point presents a down and up trend whereas the lowest melting point turns out at a point where the molar fraction of biphenyl is 20%.
TDC在幼叶中的活性最高，其次依次为成叶、根和树皮。(3)在遮荫处理过程中，TSB活性先下降后上升。
TDC activity was highest in young leaves, the following were mature leaves, root and bark sequently. (3) During the period of shading, TSB activity firstly decreased, and then increased.
研究发现，当企业所处的市场环境一定时，随着学习能力水平的降低，上述两种模式的合作收益率均呈现先下降后上升的趋势；
We find that under certain market environment, as the learning capacity level went downward, the cooperative returns in both two patterns dropped first, and then rises.
本文发现劳动份额偏低，且先下降而后上升，逆经济周期变化趋势比较明显。
We find the labor income share of the primary distribution is on the low side and presents the U-shape trend which is more remarkable against the economic cycle.
本文发现劳动份额偏低，且先下降而后上升，逆经济周期变化趋势比较明显。
We find the labor income share of the primary distribution is on the low side and presents the U-shape trend which is more remarkable against the economic cycle.
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