strain triangular element

例句：

1. 1. The rope is straining under the weight of the heavy bag.
   这条绳子在重袋子的重量下被拉紧了。
2. 2. The tension in the relationship between the two families is causing a lot of strain.
   两个家庭之间的关系紧张，造成了很多压力。
3. 3.The strain on the team's resources has been high due to the unexpected rainstorm.
   由于突如其来的暴雨，团队的资源压力已经很高了。