Carlson tried to sell his invention to some companies, but, because the process was still underdeveloped, he failed.
卡尔森试图出售其发明的一些公司，但是，由于进程仍然落后，他失败了。
Carlson tried to sell his invention to some companies, but, because the process was still underdeveloped, he failed.
卡尔森试图出售其发明的一些公司，但是，由于进程仍然落后，他失败了。
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