youdao

Day and night would each be exactly 12 hours long on a spring or fall equinox only if the sun were a single point of light and Earth had no atmosphere.

如果想要昼夜在春秋分日达到精确地12小时等长，除非太阳是个单点光源或者地球上没有大气层。

youdao

When is the plane at its highest point of its trajectory and how high is it above the point where it started when it turned the engines off when it went into free fall?

飞机在飞行轨迹的最高点，是什么时候，此时距离出发点，也就是关闭引擎的时刻，高度相差多少？，什么时候开始自由落体？

youdao

From this point of view a fall in the yen should be cheered not feared.

ECONOMIST: A weaker yen is good news, not bad, for Japan��s economy

The pressure from regulators was so strong at one point last fall that Bank of America stalled foreclosures in order to re-examine the way it was handling the process.

FORBES: Bank Of America Expands Mortgage Help Centers Across U.S.

The upshot of all this activity is a marked reduction in the rate of new infections, though sceptics point out that the fall began before ARV use and circumcision became widespread, and that the role of behavioural changes (including a greater willingness to use condoms) should thus not be underestimated.

ECONOMIST: The 19th International AIDS Conference: Looking into the future | The