Bob Morgan has offered his resignation and it has been accepted.
鲍勃•摩根已递交了辞呈，并且已被批准了。
As a possible home for alien life, it has been voted the planet least likely to succeed.
作为外星生命可能生活的家园，它被认为是最不可能有生命的星球。
It has been apparent that in other areas standards have held up well.
显然在其他领域标准保持得良好。
Any contract should be treated with reserve until it has been checked.
任何契约在经过核实之前都应谨慎对待。
My life has been music, and a constant search for it has been the mainspring of my life.
我为音乐而生，对音乐的不懈探索已经成为我生活的动力。
At the risk of sounding self-pitying, I'd say it has been harder on me than it has on Joanne.
尽管听着像是自怜，我还是要说这对我比对乔安妮更难承受。
The treatment will be tried out on human beings only after it has been shown to be safe and foolproof in animals.
该疗法只有在动物身上证明安全、万无一失后才会在人体上试用。
它已经结束一段时间了。
It has been shared by the whole world.
全世界都能享受这一服务。
It has been raining all morning, hasn't it?
整个上午都在下雨，不是吗？
It has been held ten times in Hope Town.
它已经在希望镇举办了十届。
It has been 20 years since I graduated from college.
我大学毕业已经20年了。
It has been open to the public for a month.
它已经对公众开放一个月了。
It has been two months since my father left for Italy.
我父亲去意大利已经两个月了。
It has been so many days since you went to Wuhan.
你去武汉已经好多天了。
It has been a busy term and you all deserve a break.
这是一个忙碌的学期，你们都应该休息一下。
It has been one of the traditional Chinese virtues to help those in trouble.
帮助有困难的人一直是中华传统美德之一。
It has been proven that it is nearly as effective as traditional hand-washing.
经证实，它几乎和传统的洗手方式一样有效。
It has been celebrated for so long, but nobody exactly knows how it started.
人们已经庆祝它很久了，但没有人确切地知道它是如何开始的。
It has been open for two years in order to encourage us to read more.
为了鼓励我们多读书，它已经开放两年了。
It has been much easier for me to go to work since shared bikes appeared.
自从共享单车出现后，我上班就容易多了。
It has been improving the technology, including developing roadside batteries that can store the electricity.
其一直在改进这项技术，其中包括开发可以储存电力的路边电池。
It has been known for some time that plants use chemicals to communicate with each other.
人们很早就知道，植物使用化学物质来相互交流。
Our city is beautiful. It has been famous for Mount Huaguo since a long time ago.
我们的城市很漂亮。在很久以前它就以花果山而闻名。
It is the oldest football competition in the world as it has been played since 1871.
这是世界上最古老的足球比赛，因为它从1871年便开始举办。
"Mom, it has been cloudy these days. I don't think I can get this picture!" Mike complained.
“妈妈，这些天一直阴天。我想我拍不到这张照片！”迈克抱怨道。
He started to learn the piano at age 4 and it has been his favourite hobby since then.
他从4岁开始学习钢琴，从那时起钢琴就成为了他最大的爱好。
It has been sung hundreds of millions of times each year.
这首歌每年被唱上亿次。
But other sources claimed it has been dated closer to 30,000 BC.
但其他消息来源称，它的年代更接近公元前3万年。
But other sources claimed it has been dated closer to 30,000 BC.
但其他消息来源称，它的年代更接近公元前3万年。
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