希腊字母

"In sleepwalking you are half asleep and half awake," says Carlos Schenck of the Minnesota Regional Sleep Disorders Center at the University of Minnesota Medical School,"The brain produces delta waves and theta waves, which really demonstrates that the person is in a twilight state."

梦游病是在半睡着半醒的情况下形成的，在明尼苏达医学院大学里的Carlos Schenck说尼苏打地方是失眠中心，哪些真正地显示出，人是在一个暮色状态里脑子生产三角洲波浪和希腊字母的第八字波浪。

Phase, forming the triangle-shaped Greek letter Delta. The load lines are connected to the corners of the triangle.

三角形连接是指在三相连接中，相临两相首尾相连，构成三角形的希腊字母Delta，负荷线连接在三角形的角上。

Triangle-shaped Greek letter Delta.

两相首尾相连，构成三角形的希腊字母 Delta，负

B The rate of flow of visible radiation is called luminous flux, the symbol for which is the Greek letter Φ.

可见光的流率叫做光通量，它的符号是希腊字母Φ。

Last year, the center predicted 18 to 21 storms, but so many were recorded that the official naming of them exceeded the Roman alphabet and had to be supplemented with letters of the Greek alphabet.

去年，该中心预测的风暴数是 18 至 21 场，但是记录下来的风暴如此之多，以至于它们的正式名称超过了罗马字母表，不得不用希腊字母表的字母来补充。

The Roman alphabet, used by all the languages of western Europe including English, was derived from the Greek alphabet sometime after 500 BC.

而罗马字母，大约在公元前500年从希腊字母中衍生出来，所有的西欧语言包括英语都使用这种字母。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。