长期凝视是导致难治型眼病的主要原因 （Staring is one of the causes of refractory problems,这句话翻译不是很准确，请朋友们指正 ）。
这是该炉的基础。该洞是一个排水孔的泄漏或破损的情况下/通过坩埚烧毁。件的销子***成两半，将留下一个战壕中的难治性导致洞。
These trenches will allow spilled metal to access the hole rather than being blocked when a "plinth" block or piece of brick is set on the base to hold the crucible.
不幸的是，这些防御性的增加使病菌对抗生素的耐药性更强，进而导致‘难治性’感染。
Unfortunately, these defense mechanisms have the added effect of making bacteria more resistant to antibiotics, and able to cause "harder to treat" infections.
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