Things have changed since I was a lad.
从我幼时至今，一切都发生了变化。
Prices have climbed by 21% since the beginning of the year.
今年年初以来价格已经上涨了21%。
Searchers have found three mountain climbers missing since Saturday.
搜救人员已找到了自周六起失踪的3名登山者。
Demonstrators have been holding the square since Sunday.
自星期天以来，示威者们一直占据着广场。
Over three hundred people have died of starvation since the beginning of the year.
自那年年初开始，已有三百多人饿死了。
They have had effective control of the area since the security forces left.
自从安全部队离开后，他们实际控制了这一地区。
There have been various wagers on certain candidates since the senator announced his retirement.
自从那位参议员宣布引退之后，对某些候选人的打赌猜测纷纷出现。
About six thousand people were arrested, several hundred of whom have since been released.
约六千人被逮捕，不过他们中有几百人后来被释放了。
Since we have friends in Phoenix, we pop in there for a brief visit.
因为我们在凤凰城有朋友，所以我们会去那里短暂拜访一下。
Since then it may have come down to $50 billion.
从那时起，它的价值可能已经下降到500亿美元。
Since then, all the people have spent the festival with different kinds of activities.
从那时起，所有的人都用不同的活动度过了这个节日。
Talk to me about your grandfather, for it has been long since I have heard anything about him.
跟我谈谈你的爷爷吧，因为我很久没有听到关于他的任何消息了。
Oil prices have dropped by over 60% since June 2014.
自2014年6月以来，油价已经下跌超过60%。
Of course since those boom years, sales have fallen.
当然，自那些繁荣的年份以来，销量一直在下降。
More than 50 state-owned companies have been sold since the early 1980s.
自20世纪80年代初以来，已有超过50家国有公司被出售。
Prices have fallen by a quarter since January.
自1月份以来，物价下降了1/4。
Such changes have not been seen since the invention of the printing press.
自从发明了印刷机，这种变革还没有出现过。
Times have changed since Grandma was young.
世易时移，现在已不是祖母年轻时那会儿了。
Our problems have multiplied since last year.
自去年以来，我们的问题成倍增加。
Can you possibly imagine all the horrors we have undergone since I last wrote you?
你能想像得出自从上次我写信给你以来，我们所经历的所有恐怖的事情吗？
They worked together in the 1960s, and have kept in contact ever since.
他们在20世纪60年代曾一起工作，自那时起就一直保持着联系。
Since I have the floor for the moment, I want to go back to a previous point.
借此发言的机会，我想回到前面的一个问题。
Their kids have shot up since I last saw them.
自我上次见了以后，他们家几个孩子一下子长高了。
They are rivals who have known each other since boyhood.
他们是少年时代就相识的对手。
Since war broke out, the phones at donation centres have been ringing off the hook.
自从战争爆发以来，捐款中心的电话一直响个不停。
The cost of garlic is among them: wholesale prices have almost quadrupled since March.
大蒜的价格就是其中之一：批发价格自3月份以来几乎翻了两番。
Yet almost since the idea took root, exceptions have been cropping up.
然而，自从这个想法被提出以来，异常情况就不断出现。
It's estimated that more than 2 million people have left the rolls since 1994.
据估计，自1994年以来，已有200多万人的名字从这个名单划去。
I have been skiing since I can remember.
从我有记忆起我就在滑雪了。
I have never caught a cold since I was born.
自从我出生以来，我从来没有感冒过。
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