But when the food was in contact with tile or wood, 48-70% of bacteria were.
但当食物与瓷砖或木头接触时，会有48% -70%的细菌（留在上面）。
But when the emotion that leads to stiffening the lip is more intense, and involves strong muscle tension, facial feedback may heighten emotional response.
但是当导致嘴唇僵硬的情绪变得更加强烈，并导致肌肉强烈绷紧时，面部表情反应就可能会增强情绪反应。
But when the mice were well-fed, they stayed in areas of the cage that were considered "safe".
但当老鼠吃饱后，它们会呆在笼子里被认为“安全”的地方。
But when the researchers plugged in a number of other variables, such differences disappeared.
但当研究人员加入其他一些变量时，这种差异消失了。
Emma was quick to volunteer, but when the keeper opened the first cage, the squirrel inside jumped out.
艾玛很快成为了志愿者，但当饲养员打开第一个笼子时，里面的松鼠跳出来了。
They appear to be okay, and they look good, and they're easy and cheaper for now, but when the storms move in, they crumble.
它们表面看起来还可以，而且现在看来十分方便和便宜，但是当暴风雨来临时，他们就崩溃了。
I stepped carefully into the swimming pool but when the water came up to my stomach, I lost my balance again and fell into the water.
我小心翼翼地走进游泳池，但当水涨到我的肚子时，我再次失去平衡，掉进了水里。
The fur trade kept nutria in check for decades, but when the market for nutria collapsed in the late 1980s, the cat-sized animals multiplied like crazy.
几十年来，毛皮贸易一直控制着海狸鼠的数量，但在20世纪80年代末，海狸鼠毛制品市场崩溃，导致这种猫大小的动物的数量疯涨。
But when the light hits them they change to amber.
但是如果有光照在上面就会变成琥珀色。
But when the pain increases, you decide to rest it.
但是疼痛却随之加剧，迫使你停下来。
But when the chilly morning air hits me, I let my worry go.
但是当早晨的凉风拂过脸庞时，我忘了所有的担忧。
Set a timer and try to work, but when the timer goes off, stop.
定好闹钟，试着去工作，但是当闹钟响起，停止工作。
But when the strategy goes wrong, the taxpayer foots the bill.
但是当策略出错时，将由纳税人来承担费用。
But when the spring comes maybe they will come and buy our cars.
但是当春天来临的时候他们可能会来买我们的汽车。
But when the same thought comes during a dream, it's harder to dismiss.
但同样的想法出现在梦境中时，我们往往难以释怀。
But when the lump is still there a week later, you consult your doctor.
但当一个星期后肿块仍然存在，你就去咨询医生了。
But when the negative stereotype was brought up, gender differences emerged.
但是提到消极的成见时，性别区别就出现了。
But when the inquirers learned what was involved, most of them shied away.
但当询问者得知涉及的内容时，他们中的多数都回避了。
But when the tap ran freely, water was squandered, and-inevitably-stopped.
但当水龙头可以免费开时，水被大量浪费，然后-不可避免的-水没了。
But when the researchers added an interruption, the older subjects struggled.
但当研究人员进行干扰时，年长的志愿者记忆就费劲了。
But when the inside is lit up at night, the facade becomes a glowing checkerboard.
但是，当夜晚在里面点亮灯光，外观就变成一个发光的棋盘。
But when the culture becomes more accepting, experimentation is likelier to follow.
但当这种文化越来越被人所接受时，这种事更容易被模仿。
But when the credit markets suddenly seized up, the strains soon began to show.
然而，一旦信用市场突然失灵，它将面对的压力也会接踵而至。
But when the vision remained blurred for several days, my mind began to wander.
但是，过了好几天，视力仍然模糊，我开始闹心。
But when the tweakers took over the efficiency of the steam engine swiftly quadrupled.
但是当巧匠们接手之后，蒸汽机的效率一下子变成了四倍。
But when the tweakers took over the efficiency of the steam engine swiftly quadrupled.
但是当巧匠们接手之后，蒸汽机的效率一下子变成了四倍。
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