All staff are cross-trained to handle both front desk reception and back-office data processing.

cross-trained 是由前缀 cross-（表示"交叉"）和动词 train（培训）的过去分词 trained 组成的复合词，字面意思是"交叉培训的"。cross-training 指让员工接受多个岗位的培训，使其能够胜任不同职位的工作。