Meanwhile the hydrochloric acid has only traveled through about two fifths of the tube.

与此同时，盐酸只通过了大约五分之二的管子。

The trapezoid soldier's diagonal side goes up 2 and over 5, giving it a slope of two fifths, or 0.4.

梯形士兵的对角线边上升 2 并超过 5，斜率为五分之二，即 0.4。

While two fifths of thestudents provided the information that the rainforests provide oxygen, in some casesthis response also embraced the misconception that rainforest destruction wouldreduce atmospheric oxygen, making the atmosphere incompatible with human life onEarth.

虽然有 2/5 的学生提到热带雨林能够提供氧气，但是在某些情况下，这一回答也包含着一些误解，例如他们认为热带雨林的破坏会导致大气层氧气减少，从而使大气层不适于地球上的人类居住。