To determine the environment action on the durability of coastal concrete structure, the effect of coastal atmospheric, geology and seawater environment on the coastal concrete structure was examined.

为探讨环境作用在沿海混凝土结构耐久性设计中的影响程度，对沿海混凝土结构受到的海洋大气、沿海地质以及海水环境的作用进行分析。

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The propagation of surface cracks in welded connections made of type "921A" steel has been investigated experimentally under bending fatigue load and in the corrosive environment of seawater.

本文对921A钢焊接接头在海水腐蚀环境下受弯曲疲劳载菏作用时表面裂纹扩展规律进行了试验研究。

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Triassic is a period with a great change in global environment, so it is more difficult to study its strontium isotopic composition of seawater.

三叠纪是地球环境的重大变革时期，海水锶同位素组成的研究也较为困难。

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