PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书（PLUS，Testbuilder, OG）之外，就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。墨尔本文波雅思PTE培训学校专门为墨尔本，悉尼PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture，PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说，下面开始：
60秒科学：Multiple Stresses Killed Snail Memory
60秒科学节目（SSS）是科学美国人网站的一套广播栏目，英文名称：Scientific American – 60 Second Science,节目内容以科学报道为主，节目仅一分钟的时间，主要对当今的科学技术新发展作以简明、通俗的介绍，对于科学的发展如何影响人们的生活环境、健康状况及科学技术，提供了大量简明易懂的阐释。
Stress sucks. It can affect your body and mind.
Previous research has shown that stress can even hinder our ability to remember. But these studies have typically focused on one stress at a time. What happens when we face multiple stresses?
Researchers looked at pond snails, often used in memory research. They trained the snails to reduce how frequently they breathe out of water. They then tracked whether the snails remembered their training after being stressed. The snails’ memory was considered intact if they reduced their attempts to breathe when removed from water.
Two common stressors low levels of calcium, necessary for strong shells, and overcrowding by other snails can happen in combination in the wild.
Individually, these stressors only blocked the formation of new long-term memories in the snails. But combined, they caused the snails to forget their training, that is, they prevented any new memories from being formed. The study is in the journal PLoS ONE.
It’s thought that these snails and mammals have similar responses to stress. Of course, when stressed out, we should remember to breathe more, not less.