重點(diǎn)講解：
1. wear down (使)磨平；(使)磨光；
The machines start to wear down, they don't make as many nuts and bolts as they used to.
機(jī)器開始出現(xiàn)磨損，螺母和螺釘?shù)漠a(chǎn)量不如從前了m0I%00&GW;。
2. even though 即使；盡管；縱然；
She never took a taxi, even though she could afford to.
盡管她坐得起出租汽車，但她從未坐過(guò)=eHmaQ#+W!Fj!WBX。
3. pick up 拿起；提起；拾起；撿起；
She bent down to pick up her glove.
她俯身去撿手套9)#u,sf9B2Pd,e0dVv。
4. go extinct 滅絕；絕種；
Most animals went extinct because of evolution.
大部分動(dòng)物的絕跡是因?yàn)檫M(jìn)化演變之故reh5|XnXzYBe&。