这是给定的条件-，点a点b之间，存在高度差。
It's a given — there is a height difference between a and between b.
注意站台与列车之间的高度差及空隙。
Please mind the gap and height difference between the train and platform.
桌椅的高度差在280mm—300mm之间；
可调整货物作业时的高度差，操作人员的劳动强度。
Height difference of cargo operation can be adjusted, facilitating operator's labor strength.
结论EM是一种高度恶性肿瘤，该瘤生长迅速，常可复发，预后差。
Conclusion EM is a highly malignant tumor which often grows rapidly and has poor prognosis.
结论EM是一种高度恶性肿瘤，该瘤生长迅速，常可复发，预后差。
Conclusion EM is a highly malignant tumor which often grows rapidly and has poor prognosis.
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