Using sustainable harvesting norms, only 30% of the allocated forest area is used for silkworm harvesting and then is left alone for three years.
根据可持续性生产标准，在指定林区内只有30%的林木用于野蚕生产，它们在生产之后修养三年。
His skin was burnt nearly black by the sun and his clothes were made from pieces of a ship's sail. 'Poor Ben Gunn,' he went on. 'Alone for three years.
他的皮肤被晒黑了，衣服是船帆的破布条。“我是可怜的本·葛恩，”他继续说，“我一个人在这儿三年了。”
Even now, three years later, they still refuse to apologize to the children and I for the fact that Lisa died alone.
可是哪怕是三年后的今天，医院始终拒绝因为Lisa孤独地离去向我和孩子们道歉。
When my mom was widowed three years ago, her first V-day alone was the most difficult time for her because it was also my dad's birthday.
我妈妈守寡三年了，第一个没有我爸爸的情人节是她最难熬的日子，因为那天还是我爸爸的生日。
But, after fifteen years alone on the island, I was afraid, and I did not leave my cave for three days.
可是，岛上独自生活了十五年后，我还是害怕，以至于一连三天没离开过我的山洞。
He has trained for this for three years at the height of the Cold War and now he is alone in space with a malfunctioning capsule.
他为此在冷战高峰期训练了三年，现在他独自在太空中一个发生故障的航天器里。
This left her alone, old, weak, have forced farming, but also endured for three years, finally the son's funeral expenses are paid.
这回只剩她一个人了，老了，没有气力，还得用力耕种，又挨了三年，总算把儿子的丧葬费也还清了。
After worked for three years to marry, afterwards has divorced, crossed very many years alone to live, two years ago have married, life general.
工作三年后结婚了，后来离婚了，过了很多年单身生活，两年前又结婚了，生活一般吧。
After worked for three years to marry, afterwards has divorced, crossed very many years alone to live, two years ago have married, life general.
工作三年后结婚了，后来离婚了，过了很多年单身生活，两年前又结婚了，生活一般吧。
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