当种植玫瑰时，土壤应该浇透。
按照游戏的编程设计，当种植或收获庄稼之类特定行为完成时，会向玩家的Facebook好友发送最新消息。
The games are programmed to send updates to players’ Facebook friends when certain actions are completed, like planting or harvesting crops.
就算对那些有钱购买的人来说，化学杀虫剂也不是很有效，因为当种植户发现害虫将大规模出现的时候就已经太晚了。
And even for those who can afford them they are not that effective since, by the time a farmer spots an infestation, it is too late to spray.
当他们开始定居、种植作物和饲养动物时，他们对复杂数字系统的需求变大。
As they began to settle, grow plants and herd animals, the need for a sophisticated number system became paramount.
但是，当一片草地上种植着灌木丛的时候，孩子们就会更多地参与到幻想游戏中，并且社会等级此时便建立在想象力和创造力的基础上。
But when a grassy area was planted with bushes, the children got much more into fantasy play, and the social hierarchy was now based on imagination and creativity.
为了节省开支，她开始种植蔬菜和水果——从草莓苗圃到苹果树——当她的第一批幼苗长大时，她的精神振奋起来。
To stretch her budget, she began putting in vegetables and fruit—everything from strawberry beds to apple trees—and as her first seedlings grew, her spirits lifted.
当虚拟树足够大时，蚂蚁森林将在世界的某个地方种植真正的树。
When the virtual trees are big enough, Ant Forest will plant real trees somewhere in the world.
当玉米从墨西哥传到欧洲的时候，他们有了一种更耐寒的作物，更容易在更偏北的气候条件下种植，权力的中心也随之转移。
When corn came to Europe from Mexico, now they had a much hardier crop that could be grown easily in more northerly climates and the centers of power began to shift accordingly.
当另一种植物获得化学物质时，它就会开始释放自己不同的化学物质。
When another plant gets the chemicals, it starts to give out its own, different chemicals.
当“绿色能量”足够多时，蚂蚁金服将种植一棵真正的树。
When there is enough "green energy", Ant Financial will plant a real tree.
当这些“树”足够大的时候，支付宝将和其他一些公司会一起在中国的沙漠地区种植真正的树木。
When the "trees" are big enough, Alipay with some other companies will plant real trees in the desert area of China.
比如说，有了滴灌技术，塔帕就能种植反季节黄瓜。这种黄瓜的售价要比当季的要高出三倍。
For example, drip irrigation allowed Mr Thapa to grow cucumbers out of season, when they sold for three times their normal price.
当花园直接种植在屋顶上，防水膜放在最下层，其次是隔热和根障。
When gardens are planted directly on the roof, a waterproof membrane is laid down first, followed by insulation and a root barrier.
当能源价格低廉而稳定的时候，人们可以集中种植粮食，并将产品输送到遥远的需求市场。
The current global food system worked well in a world of cheap, stable energy prices which allowed food to be grown in concentrated locations and transported over huge distances to meet demands.
现在这个和尚面临了严重的问题，因为他不知道如何种植牧草，因此有个好心人建议他说：「你可以找个农夫当伙伴，或娶个农家女，那么你就可以进行耕种了。
So now the monk was having serious problems. Because he didn't know how to cultivate land.
当产品像温室种植一样入季时，在当地是最好的，或许比一些通过运输更能源密集。
Local is best when products are in season as greenhouses may be more energy-intensive than some transportation.
国家航空和宇宙航行局研究人员认为，当需要在太空船种植作物时，将它纳入潜在未来长期航天任务(作物)是很理想的。
NASA researchers consider it ideal for inclusion in possible future long-term space missions when crops would need to be grown on spacecraft.
而当这种植物和与自己没有亲缘关系的凤仙花共用一个花盆时，它们就会使劲长出更大的叶子，好与这个非亲非故的邻居竞争。
But when those same impatiens were planted with other impatiens—but not their siblings—they put more energy into growing more and larger leaves that could crowd out the nonrelatives.
而且当贫瘠或者不那么适合种植的土地被开垦出来后，食品生产的边际成本也提高了。
Moreover, as less fertile or accessible land is brought under cultivation, the marginal cost of food production rises.
其实当巴罗达夫人得知丈夫希望他的朋友高维内尔来种植园住一两周的时候，她是有点恼怒的。
Mrs. Baroda was a little provoked to learn that her husband expected his friend, Gouvernail, up to spend a week or two on the plantation.
在去年，当蔬菜价格上涨的时候，该农民种植了大量的卷心菜，他认为这种蔬菜能在今年卖个好价钱。
When the prices of vegetables surged last year, the farmer in question cultivated large Numbers of cabbages, believing that this particular vegetable could fetch a good price this year.
咖啡也是一种植物作物。但是通常，当咖啡豆被磨成粉末然后做成饮料之后，咖啡的残渣往往被扔掉或者被仍在花园中做了肥料。
Coffee is also a plant product, but once the beans are ground and used they end up being thrown away or put on gardens as compost.
他发现这种物种生长在泉水溢出的湿泥地里，而当温泉水表面温度达到50度时，这种植物生长地的温度是25度。
The species was found growing in damp mud where the hot spring overflowed, and while water reached the surface of the spring at 50c, it was 25c in the area the plant had colonised.
通常情况下，当食品价格上涨农民会增加农作物种植量。
Farmers normally respond to higher food prices by planting more crops.
在这样一种人口复杂的地区，居民们对这种单独的种植大麻的现象更倾向于忽视，当闻到路旁的别墅散发出的气味时更是付之一笑——或许这种气味是草刚割过的气味吧。
Residents of such a diverse place may be more inclined to ignore odd behaviour and a funny smell emanating from the house down the road—provided that the grass is kept short.
学生们失败了，但当Despommier提议他们垂直地在每一层种植作物时，这个项目转败为胜。
The students were unsuccessful, but when Despommier suggested they instead try growing plants vertically on every floor, the project changed course.
当谈到市区种植时，有个特别的问题，Wally说他种的农作物不能长得太高，否则它们会吸收太多的污染。
There are unique considerations when it comes to urban farming, Wally says: He can't grow crops that will get too tall, or else they will absorb too much pollution.
但是Hertel称，当食物缺乏时，市场肯定会有反应：价格上涨、农业利润更丰厚以及农民扩大食物种植。
But when food gets scarce, Hertel says, markets do respond. Prices go up, farming gets more profitable, and farmers grow more food.
但是Hertel称，当食物缺乏时，市场肯定会有反应：价格上涨、农业利润更丰厚以及农民扩大食物种植。
But when food gets scarce, Hertel says, markets do respond. Prices go up, farming gets more profitable, and farmers grow more food.
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