The moist breath of the surrounding rain forest flows through you with each lungful of air as the small group makes its way along the narrow trail carved out of the steep river bank. Above, sunlight filters through the high canopy(天棚); be low, the river flows lazily along, its high banks thick with jungle growth. You walk along the narrow path in the late morning sun, the jungle and your fellow hikers glistening in the hot dampness of the rain forest. Every several yards, your guide turns and explains the animals and plants surrounding you, or maybe a historical tidbit about the ancient trail you follow. Occasionally a raised hand abruptly motions the group to silence, a half- dozen pairs of eyes follow the guide’s stare; pee ring into the dense bush.., a sighting of an endemic jungle bird, a rare privilege to see and hear. You clamber along the trail, taking it all in.
As you walk along, you think about all the different angles you can use to write and publ
The sudden up thrust of warm, moist air into the terrible cold of the frozen heights is what creates thunder. The sudden stronger rubbing together or two unlike forces (very warm air against very cold air) develops a kind of electricity called" static electricity". Its charges pro duce lightning and thunder. (46) Thus the violence of the thunderstorm is an almost direct result of millions of warm water drops being thrown into compatible masses of ice crystals--hitting them , rolling over them, melting them, or being frozen by them into snow or hail.
Exactly how the electric charge is developed by the many, complex forces of this battle of heat and cold is still a matter of opinion. Some scientists think the action of wind against the rain is the principal factor. (47) These scientists believe the wind tears off the outer surface of each falling drops, like pulling a sweater over a child’s head, making a fine negative charge while leaving the main
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