They pressed themselves flat against the tunnel wall as the train approached.
《牛津词典》
2. 从那以后我的事业似乎碰了壁。
After that my career just seemed to hit a brick wall.
《柯林斯英汉双解大词典》
3. 调查人员碰了壁，问谁谁都默不作声。
The investigators were confronted by a wall of silence.
《牛津词典》
4. 下面这个是子宫，大概有一半是子宫壁、输卵管和卵巢。
This is the uterus down here, sort of half of it is shown with the uterine wall, the fallopian tubes, and the ovaries.
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5. 同样地，红藻和褐藻在能量贮藏和细胞壁分子方面有所不同。
Again, the good storage and cell wall molecules of red and brown algae are different.
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6. 寡聚糖素是由酶释放的细胞壁碎片：不同的酶释放不同的寡聚糖素。
Oligosaccharins are fragments of the cell wall released by enzymes: different enzymes release different oligosaccharins.
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7. 当水通过植物细胞的细胞壁，它会从含盐量最低的一侧进入含盐量最高的一侧。
When water moves through the wall of a plant cell, it will move from the side containing water with the lowest amount of salt into the side containing the highest amount of salt.
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8. 它们只是简单地感觉到它们所处环境的变化，例如，当土堆的壁被破坏时，会改变空气的循环。
They simply sense changes in their environment, as for example when the mound's wall has been damaged, altering the circulation of air.
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9. 有些决定，如壁厚和销轴直径，可能取决于科学的计算，但非科学的部分的设计仍然是首要的。
Some decisions, such as wall thickness and pin diameter, may depend on scientific calculations, but the nonscientific component of design remains primary.
There are indications that pleiotropic plant hormones may actually function by activating the enzymes that release these other, more specific chemical messengers from the cell wall.
