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1.dozens of 数十个……
8 people died, dozens of others were injured in the blast.
爆炸事故造成8人死亡，另有数十人受伤。
2. have access to 获得
At the end of the ice age, these dogs' ancestors also had access to other sources of food.
在冰河时代末期，这些犬种的祖先同样找到了其他的食物来源。
3. to make matters worse 更糟糕的是
To make matters worse, he left his briefcase on the train.
更糟糕的是，他还把公文包落在火车上了。
4.threaten to... 有……的危险
Local fighting threatens to escalate into full-scale war.
局部战斗有逐步升级为全面战争的危险。
