那些根也可以帮助土壤抵御风的侵袭而且紫花苜蓿对于动物来说也是一种宝贵的食物来源。
Those roots also help hold the soil against winds. And alfalfa can be a valuable food source for animals.
数字输出有助于抵御无线电和电磁干扰，也就减少了安装在电脑显示器上的麦克风的音频问题。
Digital output helps protect against radio and electromagnetic interference, which can cause audio problems with microphones mounted on computer displays.
太阳在地球附近的电磁场已经偏向南方，在地球抵御太阳风的磁场防卫层上打开了一道口子。
The sun's magnetic field near Earth has tipped south, opening a crack in Earth's magnetic defenses against the solar wind.
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