Different cultures and regulations also pose a challenge, Sinoma said.
不同的文化和法规也构成挑战，中材公司说。
Brothers of a different kind - identical twins - also pose a tricky question.
另一种兄弟——同卵双胞胎——也带来了一个棘手的问题。
Brothers of a different kind - identical twins - also pose a tricky question.
另一种兄弟——同卵双胞胎——也带来了一个棘手的问题。
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