气门传动组的主要功用使进、排气门能按配气相位规定的时刻开闭,且保证有足够的开度。
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The interviewer asked Michael Jordan some questions about his career.The interviewer ________________________________ about his career.
After I picked up my old friend at the airport, we had lunch together.After I picked up my old friend at the airport, we _______________.
He was afraid the dog’s hair might make the seats dirty.He was afraid the dog’s hair might _______________.
As a musician, she has made great efforts to make her techniques perfect.As a musician, she has made great efforts to______________________.