1、concentrate
全神貫注;集中（心思）
It was up to him to concentrate on his studies and make something of himself.
是否能專心學習并取得一定成就要靠他自己。
Water companies should concentrate on reducing waste instead of building new reservoirs.
自來水公司應該集中精力減少水浪費，而不是修建新水庫。
使集中;使匯集
Italy's industrial districts are concentrated in its north-central and north-eastern regions.
意大利的工業區集中在該國中北部和東北部地區。
Most development has been concentrated in and around cities.
土地開發主要集中在城市及周邊地區。
2、vanish
消失;失蹤;突然不見
He just vanished and was never seen again.
他就這么消失了，再也沒人見到過他。
The aircraft vanished without trace.
飛機消失得無影無蹤。
(物種）滅絕;（傳統）消亡
Near the end of Devonian times, thirty percent of all animal life vanished.
在泥盆紀末期，30％的動物物種都滅絕了。
all the species of birds that had vanished from Iowa.
艾奧瓦州所有消失了的鳥類物種