But once the vessel is in motion the additional drag results in only a 3-5% reduction in speed, says Mr Ray.
但是雷说，船一旦开动起来，其附加阻力造成的减速仅在3 - 5%。
2
Then the relationships between the numerous cracks and residual stress should be analyzed by testing the vessel systematically with X-Ray method.
用X射线法对该球罐进行了系统的残余应力测试，分析了大量裂纹与残余应力水平的关系。
3
Variance analysis showed that the fiber and xylem ray proportion among populations were insignificant, but the vessel-elements proportion varied greatly.