您要查找的是不是：
- P-T界线P-T boundary
- K／T界线K/T boundary
- P／T界线Permian/Triassic boundary
- E/K界线E/K boundary
- 这两种意见界线分明。There are no indecisive boundaries between the two opinions.
- 高kHigh-k
- K肥K fertilizer
- （kk
- 这两个邻居在住房界线问题上剧烈争吵。The two neighbors disagreed bitterly about their boundary line.
- k/nk-out-of-n
- K泡potassium bubble
- 标明界线to designate boundaries
- K镜K mirror
- 各级保护区应当有明确的地理界线。Protection zones of all grades shall be indicated by clear geographic demarcations.
- K相K phase
- 打破界线to break down barriers
- K-BK-B
- K=1K=1
- 他们站在界线外看比赛。They watched the match from the sidelines.
- K-LKarhunen-Loeve
