It has a span of4260 feet. The bridge is so long that the shape of the earth had to be taken into account by its designer.
桥的跨度有4,260英尺。桥梁很长，所以它的设计师不得不考虑地球的形状。
China succeeded in launching its first man-made earth satellite in1970.
1970年中国成功地发射了第一颗人造地球卫星。
A point considered to be at nominal zero potential and to which all other potentials in the circuit are referred, often, but not always, connected to the actual surface of the earth; as a verb to connect to a ground. Also called earth.
电路中的一个参考点，该点电位作为标称的零电位，其它所有电位均相对于该点而定。经常，但并非总是，将该点直接连接到地。作为动词，指连接到地线上的过程，也称作接地。
