scavenging
清理垃圾
scavenging
瀏覽; 清除
scavenging
清掃
Scav·eng·ing p. pr. & vb. n. of Scavenge. Hence, n. Internal-combustion Engines Act or process of expelling the exhaust gases from the cylinder by some special means, as, in many four-cycle engines, by utilizing the momentum of the exhaust gases in a long exhaust pipe.
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scavenging
adj 1: searching for and salvaging anything useful from discarded
material; "scavenging larvae"
2: searching for and feeding on decaying matter; "scavenging
hyenas and vultures"