与对照组比较，研究组脑诱发电位失匹配负波潜伏期延长，波幅降低。
Compared with control group, MMN latency was significantly prolonged and MMN amplitude was significantly reduced in study group.
充气泡沫泥浆由于比重低，液柱压力低，实现了负压钻进，能大幅度提高机械钻进，延长钻头寿命。
The aerated foam mud fluids can used in negative drilling, and enlarge the life of drilling bits for its low density, and low sap pressure.
结论：GST对家兔窦房结具有负性变时作用，并可延长复极化时程。
CONCLUSION: GST exerted a negative chronotropic action and induced a delayed repolarization of pacemaker cells in SA nodes of rabbits.
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