This paper introduces specific measures of a certain C40 large concrete backstrength wall and loading trench.
介绍了某反力墙及地载沟C40大体积混凝土控温抗裂的具体措施。
2
With the increasing of BMI, college students 'vital capacity, grip strength, backstrength gradually increased, however, the associated physical fitness mass indexs decreased.
随着BMI的增加，大学生肺活量、握力、背肌力逐渐增长，而相关的素质体重指数却逐渐减小。
3
Back in the 1980s, researchers found that jumping on a trampoline was a good way to help astronauts regain their strength.