With her hands steady at the controls, her voice calm as she spoke to mission control, Collins piloted the craft through a slow, graceful somersault. With the shuttle's underside now visible, the damage was quickly spotted - and a spacewalk was carried out to repair it.
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图①：在陕西白水县，西北农林科技大学白水苹果试验站站长高华（右）和硕士研究生于萌正在检测苹果糖度。