1. 他們能夠用雷達(dá)測(cè)定快艇的方位。
   They were able to position the yacht by means of radar.
2. 我 ... 找到一個(gè)六分儀?！昂美玻　蔽艺f，“他們就是用這?em>霾舛ㄌ艫母叨取！?
   I ... found a sextant ... "Now, " I said, "they take the sun through this thing."
3. 呼吸氣量測(cè)定器；肺活量計(jì)用以測(cè)量肺部吸入或呼出空氣的力量或體積的一種儀器
   An instrument for measuring the force or volume of inspiration or expiration in the lungs.
4. 圓弧測(cè)定器一種用于測(cè)定圓弧的儀器
   An instrument that measures circular arcs.
5. 有人已經(jīng)提出一項(xiàng)測(cè)定火星周圍大氣層的饒有趣味的建議。
   An interesting suggestion for measuring the atmosphere around Mars has been put forward.

測(cè)的英語翻譯：

定的英語翻譯：