... Above Not Essential 以上没有必要 Solid Not Essential 实无必要 Other 3D software not essential 其他3D软件无特别要求 ...
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A course in solid state physics would be helpful, but again not absolutely essential.
固体物理课程应该是有帮助的，同样也不是绝对重要。
Contrary to popular belief, eating solid food is not essential during short-term illness.
和大家通常的观念相反，在短期的小疾病中，吃固体食物并不是最关键的。
Ecologically sustainable design is not only essential but proves solid financial benefits both to the developer, the user and through positive intangibles to the larger community.
生态系统的可持续性设计不是唯一的要素，但是带给了发展商和用户稳定的财政利润，给大社会带来正面影响。
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