Keep things simple (jot down bullet points if it helps) and figure out the simplest, most effective way to move forwards.
让事情简单化(如果有必要，就记住要点)，并且找到最简单最有效的途径去解决。
Primary waves are identical in character to sound waves. The ground is forced to move forwards and backwards as it is compressed and decompressed.
主要波跟声波的特征相同，当地面被加压或减压时强迫向前和向后移动。
The sun gets higher in the sky every day, the weather gets warmer, meaning we have to be ever more vigilant about checking the safety of the ice as we move forwards.
太阳一天比一天升得高，天气一天比一天暖和，这意味着当我们在北极行走时，不得不更加小心脚下的冰面。
The time toolbar allows you to define a time interval, and then rapidly move forwards or backwards by that interval at the click of a button or press of a key.
时间工具栏允许你定义一个时间增量，然后靠单击某按钮或按下某键来快速向前或向后调整时间。
The pull rod (19) of the straw pushing device drives the straw pushing device (18) to move forwards and backwards. The lifting foot drives the straw pushing device to move up and down.
可调推草器拉杆带动推草器（18）作前进、后退动作，起落脚带动推草器作上、下动作。
The pull rod (19) of the straw pushing device drives the straw pushing device (18) to move forwards and backwards. The lifting foot drives the straw pushing device to move up and down.
可调推草器拉杆带动推草器（18）作前进、后退动作，起落脚带动推草器作上、下动作。
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