This is done by pumping fluid towards the bow, which pitches it down for a dive, or sending it towards the stern to point the nose up when ascending.
这通过将液体抽向船首来完成，这将使它的头部下沉，或者当上升时把液体抽向船尾让船首上翘。
2
But the point is that China is not just pumping out cheap goods at the expense of U. s. producers.
但是重要的是中国不再是由美国制造商支付费用的廉价商品输出国了。
3
The design layout, key process of construction, such as well point drilling quality, filtrating quality, well washing quality, continuity of pumping were discussed.