大学英语新视野第二册第一篇课文中的一句话翻译

大学英语新视野第二册第一篇课文中的一句话翻译
Unless a certain amount of time is allowed to elape,it seems in their eyes as if the task being considered were insignificant, not worthy of proper respect.Assignment are, consequently,given added weight by the passage of time.(being considered 是什么成分分词作后置定语省略的which is 吗 感觉不是这样啊)