Compared to the single hg2 + treated, se4 + + hg2 + the mixed exposure could restrain the fall of the activity of t ? aoc, sod and gsh ? px, reducing the level of lipid peroxidation, and alleviating membrane damage, represented with the heighten na + - k + - atpase activity and reduced mda concentration, resulting in the increased resistance to hg2 + damage. however, se4 + were incapable of preventing from the damage of hg2 + ultimately, along with the exposure period, regardless of the fact that the obvious enhancement of t - aoc and atpase activity
混合處理后，與單一汞處理相比， se ~ （ 4 + ）在一定程度上能有效抑制汞
脅迫引起的t ? aoc ， sod ， gsh ? px的降低，降低膜脂質過氧化水平，減輕了對膜的硒對汞致劍
尾魚抗氧化系統的毒害和生理損傷的拮抗作用損傷，表現為隨一k + / atpase活力升高，而mda含量降低，提高了機體對hg葉毒害的抗性;但隨著染毒時間延長，硒不能最終阻止毒害的加深。
Stay cables of the long - span cable - stayed bridges are susceptible to vibration under wind loading, or wind incorporated rain excitation, or deck motion due to high flexibility, relatively small mass and very low inherent damping, such as vortex shedding, wake galloping, parameter resonance and wind - rain induced vibration. large - amplitude vibration of cables may reduce the life of cables and threaten safe traffic, and has been considered today as one of the most critical problems for this type of bridge
大跨度斜拉橋拉索具有較小的質量和極低的阻尼，在風、風雨及橋面振動等外部激勵下極易發生振動，如渦激共振、
尾流馳振、參數共振和風雨振等，拉索的大幅振動對拉索的使用壽命和橋梁安全運營構成極大威
脅，它已成為大跨度斜拉橋急需解決的關鍵問題之一。
" the threat of terrorism in the middle east and the political and economic turmoil in african countries has increased the disparity between cities at the top and bottom of the rankings, " said mercer senior researcher parakatil
英國美世咨詢有限公司高級調查員帕拉卡特爾說： 「中東地區的恐怖主義威
脅和非洲國家的政治經濟混亂加劇了排在榜首和榜
尾城市之間的差距。 」
Along with the economy development, human activities not only straightly threatened the ecological environment but decreased the population number of anura
隨著經濟的發展，人類活動直接威
脅著無
尾兩棲類的生存環境，也造成其種群數量大幅度減少。
He would go to himthreaten, cajole, actually destroy him, if necessary.
他要去看他威脅、利誘、倘使需要的話，就把他徹頭徹尾地毀滅。
