The contemporary period is friendlier, yet tensions are never far from the surface.
当前两国关系友好一些了，但紧张的压力绝不仅仅停留在表面。
On the mainland, regulators are constantly changing the rules, and concerns about local protectionism and potential xenophobia are never far from the surface.
在中国内地，监管部门一直在改变规则，人们对地方保护主义和潜在仇外心理的担心从未真正消失过。
If the solution is too far from the IEP, the proteins are highly soluble and surface tension gradients never develop; too close, and the proteins precipitate out.
如果溶液远离这个等电位点，那么蛋白质会是高度可溶的因此表面张力梯度就无法形成；如果太接近这个等电位点，蛋白质会析出沉淀。
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