Give away any food you have on hand, or lock it up and give the key to the neighbours.把手头的所有食物都送给别人，或者把食物藏好锁起，然后将钥匙交给邻居。Johnny's broad smile changed slowly to a frown.约翰尼那开心的笑容渐渐收拢，锁起了眉头。Control of materials could be maintained by locking up bombs.把炸弹锁起妥藏可实现对物资的控制。