The pool's fiberglass sides had cracked and the water had leaked out.泳池四周的玻璃钢面开裂，水渗了出来。Without the support of my parents I would have probably cracked up completely. But I managed to hang on...假如没有我父母的支持，我可能已经彻底垮掉了。...

track的现在进行时为：tracking...

n.异构裂化...

keep to the beaten track的音标：...

rack的复数形式为：racks...

n.跟踪v.跟踪( track的现在分词 )，跟踪摄影，留下（脏）足迹，追随（潮流等）...

They would look out through the cracks of their weather-beaten door.他们会透过那扇经受风吹日晒的老木门的缝隙向外张望。Cracks, bulges, crumbling pointing and damp patches mean trouble.裂缝、凸起、剥落的勾缝和湿斑都意味着存在问题。Cracks appeared in the wall and a door ...

crack的第三人称单数（三单）为：cracks...

keep track of的音标：keep track of的英式发音音标为：[ki:p træk ɔv]keep track of的美式发音音标为：[kip træk ʌv]...

Pezzo takes tight turn downhill as spectators line the side of track.佩佐下山急转弯,观众站在赛道旁观看.With eleven thousand employees, it's very difficult to keep track of them all.对于一支1.1万人的员工队伍，很难及时了解到所有有人的动态。Dozens of miles of r...

n.兵营，营房，简陋或难看的房屋，营房( barrack的名词复数 )，兵营，（临时性的）棚屋，外观简陋划一的房屋v.向…提供营房（或棚屋）( barrack的第三人称单数 )，使住入营房（或棚屋），大叫，喝倒彩起哄...

Modern tennis rackets are now apparently 20 per cent lighter.现代的网球拍据说比以前的轻20%。He was put into prison because of rackets.他因敲诈被捕入狱.Tennis rackets and balls are provided.提供网球拍及网球。...

crack的现在进行时为：cracking...

backtrack的现在进行时为：backtracking...

n.（网球等）球拍( racket的名词复数 )，敲诈，墙网球，吵闹声...

firecrackers的音标：firecrackers的英式发音音标为：['faɪəkrækərz]firecrackers的美式发音音标为：['faɪəkrækərz]...

自动位置对准，自跟踪...

Many boys explode firecrackers on the Lantern Festival.许多男孩在元霄灯节燃放鞭炮.The firecrackers scared the cat.爆竹声把那只猫吓跑了.The youngsters set off string after string of firecrackers to mark Spring Festival.孩子们放了一串又一串的鞭炮, 以欢庆春节。be r...

backtracked的音标：...

n.压迫，镇压，打击( crackdown的名词复数 )...

n.碳氢化合物分裂器，氢化裂解器...

n.爆竹，鞭炮( firecracker的名词复数 )...

soundtrack的音标：soundtrack的英式发音音标为：['saʊndtræk]soundtrack的美式发音音标为：['saʊndˌtræk]...

backtrack的一般过去时为：backtracked...

brackishness的音标：brackishness的英式发音音标为：[b'rækɪʃnəs]brackishness的美式发音音标为：[b'rækɪʃnəs]...

半咸性...

armrack的音标：armrack的英式发音音标为：['ɑ:mræk]armrack的美式发音音标为：['ɑmræk]...

n.轻微的爆裂声，噼啪声，（烤猪肉的）脆皮v.发出轻微的爆裂声，发出噼啪声( crackle的现在分词 )...

A hydrocracking catalyst with high selectivity to middle distillates was developed.开发了一种具有较高的中油选择性的加氢裂化催化剂.Abstract: Typical failures in domestic fixed bed hydrocracking uni t over the years were summarized.文摘: 总结了我国固定床加...

backtrack的音标：backtrack的英式发音音标为：['bæktræk]backtrack的美式发音音标为：['bækˌtræk]...