介绍:
Commitment is what makes you tick.
语音讲解：
1.commitment
2. tick
词汇讲解：
1. commit to 把。。。托付给
He was committed to the care of an aunt.
他被托付给给一个婕妈照顾。
commitment 承担-承担责任、义务，承诺
He made a commitment to pay the rent on time.
他保证按时付房租。
2.tick
The clock went tick tock.
时钟滴答滴答走着
The clock ticks very loudly.
这只钟发出很响的滴答声
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