For their part, scientists have puzzled over the genetic mechanism that kills off cells one by one until a leaf drops.
对于科学家来说，他们只是好奇于其中的遗传机制，一个细胞一个细胞地死去直到整片树叶凋零。
Clinical experiment results show that this dividing method is quite effective for cast-off cells of urological organs.
临床实验表明，对泌尿系统脱落细胞的分割是很有效的。
A total of 168 ducts were successfully examined by FDS, and the expressions of er and pr in the cast-off cells were detected among all of the samples.
上述病例共计检查乳管168个，用免疫组化方法对导管内液脱落细胞进行ER和PR测定。
Our bodies slough off dead cells.
我们的身体会自然脱掉死细胞
Contraction of front and side parts as cells die off was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds.
随着细胞的死亡，有些人大脑前部和侧部的收缩，在三十多岁时就能观察到，但是也有些人直到六七十岁依然不明显。
Off-grid solar cells are also quiet, but they don’t make much power relative to the mini-turbine.
离网太阳能电池也非常安静，但它们无法产生相对于小型涡轮机那么大的电能。
How do different genes get turned on (" expressed ") or off (" silenced ") in just the right combinations to produce heart cells, bone cells and brain cells?
不同的基因是如何以适当的组合方式来开始(表达)或停止(沉默)自己的工作，从而制造心脏、骨骼以及脑部细胞呢？
When that happened, individual cells could turn their reproductive capacity on or off according to the function they served in Volvox's body.
因此个体细胞根据他们在团藻中所具有的功能打开或关闭控制繁殖能力的开关。
But, in this case, the salamander cells have either turned their internal immune system off, or the algae have somehow bypassed it.
但是在斑点蝾螈的案例中，要么是蝾螈细胞关掉了他们的免疫系统要么就是水藻通过某种手段绕过了免疫系统。
Researchers have engineered a benign virus that, when injected into the brain, makes the ion channels—the switches that turn cells on and off—responsive to light.
研究人员在小鼠脑内注入某种良性病毒，这种病毒使细胞膜上和细胞兴奋有关的离子通道对光产生反应。
These switches turn on and off all the time, controlling how our cells work and how we respond to our environments.
受控于我们传感器的工作或者我们对周围环境的反应，这些开关可以随时打开或关闭。
The light it gives off can then be used to track the protein in living cells.
它发出来的光可以用来跟踪生物细胞中的这种蛋白质。
He suggests Oscar is able - like dogs, which can reportedly smell cancer - to detect ketones, the distinctly-odoured biochemicals given off by dying cells.
他暗示奥斯卡有能力探测出正在死亡的细胞产生的酮——就像报道过的那只能闻出癌症的狗一样。
The effect is somewhat temporary. After a couple of months, the new cells start acting like the older cells, although they do not die off.
然而效果是暂时的，几个月后，新的细胞开始表现得和旧的细胞一样，虽然这些细胞没有并死亡。
The good news is if you do find yourself graying, you’re probably better off not having those cells persist.
好消息是，如果你发现自己‘变白’了，那么你很有可能更好地消除了这些细胞。
Although the genes seemed to turn back off once the cells were pluripotent, it wasn't clear how they might influence the cells' later behavior.
一旦细胞变为多能细胞，那些多余基因可能会被回退并关闭，但他们对细胞日后的生长会产生怎样的影响还并不清楚。
The heavy concentration of apple cider vinegar results to peeling off dead skin cells.
浓度高的苹果醋有助于皮肤中坏死、衰老细胞的清除。
The first terrestrial solar cells were used for off-grid applications in remote locations where placing conventional power lines was not possible or economical.
第一批面市的太阳能电池在偏远的“非电网”动力系统中派上了用途。 这些地区因地理或经济原因无法接通常用电力网。
The ability to use light to turn specific cells on and off with very precise timing could in principle allow new therapies.
这种用激光射线打开破损细胞的通道，以精确的瞄准杀死细胞的技术在工作原理上得到了大家的认可。
And there may be a way to keep cells from biting off more than they can swallow-snip off the nanotubes' rounded tips.
可能存在一种避免细胞吞噬过量的方法——切除纳米管的圆形端部。
"This pruning process, the dying off of cells, is a very important part of brain development," Romanski said.
“这个削减过程，这些死亡的细胞，对于大脑发育而言非常重要，”Romanski说。
Dark areas appear black rather than dark grey because the relevant cells are simply switched off.
黑暗区域显示的是黑色而不是深灰色，因为相关的单元格只是被关闭了。
The mystery of how brain cells are killed off by degenerative neurological diseases is no different.
关于脑细胞是如何被质变的神经疾病杀死的奥秘跟这没有什么不同。
But viruses know their hosts well-they can break into cells undetected, switch off alarm systems, and undermine the cell's authority in deciding which genes get expressed.
但是，病毒知道他们的宿主- - -它们可以不被发现的侵入细胞，关掉警报系统，削弱细胞决定自身基因表达的权威。
This silencing is why the DNA for, say, insulin is turned off in brain cells but active in pancreas cells.
这种抑制作用就是为什么胰岛素基因在胰岛腺中试开启的而在大脑中是关闭的。
If its stem cells are eradicated, the rest of a tumour may die off.
如果癌症的干细胞被消灭了，其他的肿瘤组织或许会死掉。
At a news conference this week, MIT researchers showed off the prototypes of their paper thin solar cells by using them to power a small LED display.
在本周召开的新闻会议上，麻省理工的研究人员使用他们制作的纸薄太阳能电池雏形展示了如何给LED显示屏供能。
Literally, you could not pick up a pencil off a bench if you were working with embryonic stem cells.
名义上说，如果要是在搞胚胎干细胞的工作，你就不能从凳子上拿走一支笔。
But after the itch cells were killed off, their scratching plummeted - in some cases stopped completely - when Chen introduced one after another itchy substance.
但是瘙痒细胞被杀死后，陈教授用一种接一种的瘙痒物质刺激白鼠，但它们搔痒程度骤然降低，有时甚至完全停止。
But after the itch cells were killed off, their scratching plummeted - in some cases stopped completely - when Chen introduced one after another itchy substance.
但是瘙痒细胞被杀死后，陈教授用一种接一种的瘙痒物质刺激白鼠，但它们搔痒程度骤然降低，有时甚至完全停止。
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