您要查找的是不是：
- Why protective earth connection and zero connection can't be mixed up? 保护接地和保护接零为什么不能混用?
- Protective earthing specification of concrete vess. 水泥船安全接地技术条件。
- Papua New Guinea Proposes Paying Poor Nations to Save Trees, Protect Earth's Atmosphere. 巴布亚新几内亚建议:富裕国家付钱给穷国,拯救那里的森林,保护地球大气。
- Holmes Rolston is considered a leading voice for protecting Earth's environment as a religious duty. 福尔摩斯?罗斯尔顿被认为是把保护地球环境作为宗教职责的先锋。
- Is the magnetic field that protects Earth from deady radiation about to reverse direction of even disappear? 保护地球免遭死亡辐射的磁场转向曾经消失过的方向？
- Implementation way of system earthing and protective earthing of transformer are suggested. 提出了作者认为变压器的保护接地、工作接地应该的做法。
- The hole in the ozone layer,which protects Earth from the Sun's ultraviolet rays,was first detected nearly 30 years ago. 人们是在约30年前发现这个臭氧层空洞的，其作用主要是保护我们不直接受到太阳的紫外线辐射。
- It was the ice shields that much like a terrarium that retained earth's warmth，and also protected earth from radiation so prevalent in your universe. 冰盖曾像一个玻璃容器，维系了地球的暖和温度，并保护地球免于遭受你们宇宙中如此普遍的放射线。
- The hole in the ozone layer, which protects Earth from the Sun's ultraviolet rays, was first detected nearly 30 years ago. 人们是在约30年前发现这个臭氧层空洞的。而臭氧层的作用主要是保护我们不直接受到太阳的紫外线辐射。
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- A mother naturally feels protective towards her children. 母亲对自己的孩子自然会悉心保护。
- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- They netted the fruit trees to protect them from birds. 他们用网覆盖住果树以使其免遭鸟害。
- The earth is only a speck in the universe. 地球在宇宙中只不过是一个小点罢了。
- In connection with the construction of lightning protective earthing system in residential area, the application of non-metal earthing module was introduced and the experience learned in practice was summarized as well. 摘要结合居民小区防雷接地系统工程建设，介绍了非金属接地模块在工程中的应用，总结了实际经验。
- How on earth do they manage to rob the bank? 他们到底怎么抢了银行的？
- A number of satellites are now circling the earth. 一些人造卫星现在正环绕地球飞行。
- The machine cast up a big heap of earth. 机器卷起了一大堆泥土。
- The red sun lights up the sky and the earth. 红太阳照亮了天空和大地。
- How can we protect our computer files? 我们怎样才能保护我们的计算机数据？
