• 1. flight line spacing: 航线间隔
• 2. flight-line spacing: 航线间隔

• 1.It is generally accepted that a flight line spacing of one half the expected depth of burial of a target is required to delineate that target adequately.
  众所公认，一条间距为目标预期埋藏深度一倍半的航线应充分勾勒出目标。
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