Indeed, it may be for any of the factors, physical as well as biotic, that are essential for organisms.
事实上，竞争对象可能是生命体所必须的任何生物或非生物因素。
In planning for a release, it may be wise to decide upfront that particular requirements will certainly be addressed in the upcoming release (essential themes).
在发布的规划中，事先确定特定的需求将会在即将到来的发布(重要主题)中处理是非常明智的做法。
"Perhaps arsenic is not an essential component for habitability or for life, but it may be one that can be tolerated," she added.
“也许砷并非生命生存的必要元素，但它可能是一种可接受的元素，”她补充道。
Willpower and patience may be essential for an investor to be successful, however it is necessary for one to require help from professional bodies to ensure that success will be achieved.
意志力和耐心，可视为投资者获得成功的必要条件，但从专业机构获取帮助，也是能确保成功的重要条件之一。
Although lavender is an essential oil that may be used directly on the skin, it can be drying if over used.
尽管薰衣草是一款可以直接用在皮肤上的精油，如果过量使用能让皮肤干燥。
This may be true that some experts have predicted it: the central air conditioning will certainly become essential to healthy housing one of the 21st century.
这可能真应了有些专家预言的那样：中央空调势必成为21世纪健康住宅必不可少之一。
You may select any two team members, but it is essential that the third member of your team be Nyah Nordoff-Hall.
你要接受的任务是，找回失窃的“金美拉”资料，你可以随意选择两名小组成员，但第三个成员必须是奈雅·诺尔多夫-霍尔。
You may select any two team members, but it is essential that the third member of your team be Nyah Nordoff-Hall.
你要接受的任务是，找回失窃的“金美拉”资料，你可以随意选择两名小组成员，但第三个成员必须是奈雅·诺尔多夫-霍尔。
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