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1. Officials are stepping up security at the site to ensure that recovery crews can preserve personal items for family members of the victims.
step up 提高；增加
He urged donors to step up their efforts to send aid to Somalia.
他敦促捐赠者再接再厉，将救援物资送往索马里。
2. Europe's soccer champions have returned home to Italy, with cheering fans lining the streets as the team bus passed by.
pass by 经过；逝去
As they pass by, a piteous wailing is heard.
他们经过时，传出一阵痛哭声。
