It is impossible to divide a given common angle or arc(instead of the particular angles or arcs)into three equal parts by using a rule and compasses.
用尺规将一个任意角或弧绝对准确三等分是不可能的。
For any graphic symbols made up of point, line and arc, it was transformed to a corresponding character string based on a rule.
本文给出一种通用的基于点、直线和弧线的图形符号画法,对任何由点、直线和弧线构成的图形符号,按统一的转换规则转换出相应的字符串,将这些字符串交给同一个画图函数,就可以画出相应的图形或符号。
One second of arc movement is one thirtieth of a millimetre.
一弧秒的移动是一毫米的三十分之一。
The probe, which gets left behind, can sense movement down to 100th of a second of arc.
跟在后面的探测器能感到百分之一弧秒的移动。
If the diameter of the pupil is 6 mm the eye is able to separate 120 seconds of arc.
如果瞳孔直径为6毫米，人眼可分辨120弧秒。
We wouldn't allow more than five seconds of arc movement, that is, about one and a half millimetres of movement at the top of the tower."
我们不允许超过5弧秒的移动量，这对塔顶来说是大约1.5毫米。”
Until recent years, this tilt has increased by around 6 arc seconds, or about one-fifth of a millimetre each year.
直到最近，塔身倾斜每年递增6弧秒，或约1／5毫米。
Comparatively rudimentary interferometer observations suggested that this source is about 1.5 across.
不很精确的射电干涉仪观测表明，这个源的角径约为1．5弧秒。
"At its closest, Mars will be 25 seconds of arc in diameter, the size of a tennis Ball at a distance of 528 metres."
在最近的地方,火星的直径是25弧秒,看上去跟528米以外的网球差不多大。
Use Drawing Page's Units;Degrees;Deg;Deg-Min-Sec;Radians
使用绘图页的单位;度数;度;度-分-秒;弧度
Cycles per second.
每秒周数，周／秒，赫
10-15second, or0.001 picosecond(1 picosecond is1 trillionth of a second).
10－15秒或0。001皮（可）秒（1皮秒是10－12秒）。
Ns [Nanosecond]
毫微秒[十亿分之一秒
Thirty two feet per second, per second.
每秒三十二英尺，每秒钟。
One thousandth(10-3) of a second.
微秒千分之一（10－3）秒
D/s=disintegrations per second
每秒衰变数,衰变/秒
Little seconds form minutes,
一秒一秒构成一分，
I got a time penalty of 12 seconds.
我被罚 12 秒。
It is measured in milliseconds so1000 ms=1 second.
他是以毫秒计算的，1000毫秒=秒。
One trillionth(10-12) of a second.
皮可秒，微微秒万亿分之一秒（10－12）