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重点讲解：
1. be able to do sth. 可以…的，能够…的；
It must be better to be able to offer them love and security.
要是能给予他们关爱和安全感肯定会更好。
2. get through 通过；
When you do get through, you've got to say your piece quickly before you get cut off.
电话接通后，你最好在断线之前尽快把话说完。
3. be close to 近的；接近的；
The best place to catch fish on a canal is close to a lock.
运河上捕鱼的最佳地点是靠近水闸的地方。
4. be known as 称为；叫做；
She is known as a great beauty.
她是出了名的大美女。
n. 运河，沟渠，气管，食管
vt. 建运河，
