Mathematical knowledge was certain and offered a secure foothold in a morass.
数学知识是确定无疑的，它给人们在沼泽地上提供了一个稳妥的立足点。
It may be many years before the new company can gain a secure foothold in the market.
也许要经过若干年这家新公司才能在市场上取得稳固的立足点。
It may be many years before the new company can gain a secure foothold in the market.
也许要经过若干年这家新公司才能在市场上取得稳固的立足点。
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