土壤微粒沉积在自己的河床上，使河流变浅。
Particles of soil are deposited on the riverbed itself, making the river shallower.
急性链球菌感染所致化脓性脑膜炎患者脑膜下可见化脓性渗出物。渗出物使脑沟变浅。
A purulent exudate is seen beneath the meninges in the brain of this patient with acute meningitis from Streptococcus pneumoniae infection. The exudate obscures the sulci.
过小的气体流量则使等离子弧失去应有的挺直度而使切割的深度变浅，同时也容易产生挂渣；
The too small gas flow makes plasma arc lost due to the degree and straight cutting depth becomes shallow, but also easy to produce hang slag;
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