But a study in the journal Current Biology suggests that feeding birds in winter can influence their course of evolution.
不过《当代生物学》杂志上的一项研究却表明，在冬季向鸟类投食可能会影响到它们的进化进程。
Longitudinal uniformity is decided to a great extent by weighting balance feeding fiber current and transverse uniformity is closely relating to air transverse distribution.
纵向均匀度在很大程度上取决于成网机定量喂给的纤维流，而横向均匀度还与气流横向分布密切相关。
First we presume feeding rate, ascertaining the velocity of air current, ascertaining the feeding quantity by farm technical demand and ascertaining wind quantity, calculating the diameter of pipe.
首先假定输送比，初定气流速度，由农业技术要求确定排种量，从而确定风量，计算得到管道的直径。
All these indicated that 1% premix feed for sows newly developed is better than 1% premix feed for sows prepared according to current sow feeding standard in China.
结果显示：研制的1%预混料明显优于按我国现行母猪饲养标准配制的1%预混料。
The basis and current situation of the various weaning ages and phase feeding programs for piglets are expounded, especially their advantages and disadvantages are analysed in this review.
阐述仔猪不同断奶日龄及相应阶段饲喂体系的实施依据和应用现状，重点分析不同断奶日龄及相应阶段饲喂体系的利弊。
In some welding cases of high requirement to arc voltage and arc current, the usual wire feeding system is unable to meet the needs of wire feeding at present.
在一些对电弧电压、电弧电流要求很高的焊接场合，目前常用的送丝系统将难以满足要求。
Current advice from the Food Standards Agency is that pregnant and breast-feeding women can eat between one and two 140g portions of oily fish a week.
现在的食物的标准建议，怀孕和哺乳妇女可以每周食用1-2次140g的油性鱼类。
Finally the integrated circuit has a first voltage level controller provided to split the voltage needed to program the NPN-transistor over the first and at least second current feeding circuit.
最后，所述集成电路包括一第一电压电平控制器，所述第一电压电平控制器设置成在所述第一及至少第二电流馈电电路上分离对所述npn晶体管进行编程所需的电压。
The current situation of breast-feeding in 1990s in a rural area of Linli county of Hunan had been investigated and evaluated.
对湖南临澧县农村90年代母乳喂养现状进行了调查及评价，对农村产妇缺乳的危险因素进行了研究。
The current situation of breast-feeding in 1990s in a rural area of Linli county of Hunan had been investigated and evaluated.
对湖南临澧县农村90年代母乳喂养现状进行了调查及评价，对农村产妇缺乳的危险因素进行了研究。
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