You won't know exactly how they are changing until a few weeks after the retrograde period is over, so in April and the first half of May you will need to watch and wait.

你不会知道它到底会怎样转变，直到几周后它的隐退期结束，所以在四月份和五月的前半月，你需要观测和等待。

youdao

That urban growth—roughly half of humanity already lives in cities for the first time in recorded history—may lead to a big increase in greenhouse gas emissions.

有史以来，居住在城市里的人口粗略达到了整体人口的一半，这种城市扩张可能会导致温室气体排放的猛增。

youdao

This was nevertheless half the 6.4% decline notched up in the first three months of the year, leading many to believe that the worst of South Africa’s first recession in 17 years may be over.

不过，这也只是今年头三个月6.4%缩水率的一半。 这一事实使得许多人相信，南非17年来的第一次经济衰退的最糟糕时期已经过去。

youdao

Russian officers are speaking nervously of a new guerrilla offensive in the first half of May.

ECONOMIST: Chechnya

Patel is not in the Test squad, so is not required by his country for the two Tests at home to West Indies in the first half of May.

BBC: Patel primed for IPL opportunity

Many readers may not remember the first half of 1998, but may be more likely to recall the Russian ruble crisis in July 1998 and the ensuing collapse in the fall of hedge fund Long-Term Capital Management (LTCM).

FORBES: Will 2012 Be a Repeat of 1998?