Parallel lines converge at infinity.平行线永不相交.This eliminates reflections from infinity, as one expects physically.正如物理上所预期的,这就消除了来自无穷远处的反射.These permutations multiply towards infinity.这些排列可以增加到无穷大。It is shown that the pro...
Both root and root cap are covered by a sheath - like structure called the coleorhiza.根和根冠被一鞘 状 结构,即胚根鞘所覆盖.Coleorhiza ( pl . coleorhizae ) The protective sheath surrounding the radicle in grasses.胚根鞘:保护幼根的鞘状结构....
Sextant can be used for exploration and navigation .六分仪可用于航海和勘探中。To navigate , they must fix their sextant on something concrete.要行动, 就必须要立足于某个坚实的事物上.Other early instruments included the sextant and the astrolabe.另外的早期仪器...
尽可能重复使用纸张。Try where possible to reuse paper.使尺子与纸张的中部成一条直线.Align the ruler and the middle of the paper.他在纸张的两面都写字以节省用纸.He writes on both sides of the sheet to conserve paper....