Use a reliable method of contraception.采用安全的避孕方法。She is known to have liberal views on divorce and contraception.众所周知，她在离婚与避孕方面思想很开明。to give advice about contraception就避孕方法提供咨询Contraception birth control by prevention of...

Brand's keen ear caught the trace of an accent.布兰德敏锐的耳朵听出了口音。Now draw or trace ten dinosaurs in ascending order of size.现在按照体型由小到大的顺序画出或是临摹出10只恐龙。There was a trace of exasperation in his voice.他的声音听上去有些愤怒。...

...a demand for a greater choice of effective contraceptive methods...对于更为多样的有效避孕方法的需求It and removed by a hysteroscope and is expected to be aand permanent intratubal contraceptive device.结果表明,输卵管聚乙烯节育栓有望成为经宫颈途径持久的避孕器.Th...

We must trace the source of these noxious gases before they asphyxiate us.在我们被这些有毒气体窒息之前,必须查出其来源.There was a trace of exasperation in his voice.他的声音听上去有些愤怒。The lecture will trace the depiction of horses from earliest tim...

卫矛科...

The law allows doctors to prescribe contraception to the under 16s.法律允许医生给16岁以下未成年人开避孕药。She is known to have liberal views on divorce and contraception.众所周知，她在离婚与避孕方面思想很开明。to give advice about contraception就避孕方法提供咨询...

Wash them in cold water to remove all traces of sand.用冷水冲洗它们以清除所有的沙子。Meat which has been cooked thoroughly shows no traces of pinkness.彻底煮熟的肉不会带有血色。The local church has traces of fifteenth-century frescoes.当地教堂仍留有15世纪壁画的...

trace的第三人称单数（三单）为：traces...

v.折回( retrace的过去式和过去分词 )，回忆，回顾，追溯...

Depression can be traced to holding in anger.抑郁症可以追溯到对愤怒情绪的压抑。Lovelock'sprincipled nonconformity can be traced to his childhood.洛夫洛克自成一套的特立独行可以追溯到他的童年时期。These quotations cannot readily be traced to their sources.这些引...

v.折回( retrace的第三人称单数 )，回忆，回顾，追溯...

Most telephone calls are traceable.大多数电话都可查出是从哪里打来的。The probable cause of his death is traceable to an incident in 1724...他的死亡很可能是由 1724 年的一起事件造成的。The present basic course cannot cover all intersexual conditions traceabl...

vt.跟踪，追踪，追溯，探索，探索，查找vi.沿着一小径或道路前进，可以追溯的n.痕迹，踪迹，微量，极少量，[植]（脉）迹，痕迹...

adj.（位于或发生于）细胞外的...

retrace的现在进行时为：retracing...

trace的一般过去时为：traced...

trace的音标：trace的英式发音音标为：[treɪs]trace的美式发音音标为：[treɪs]...

adj.不能回头的，不能再找到的...

macrotrace的音标：macrotrace的英式发音音标为：['meɪkrətreɪs]macrotrace的美式发音音标为：['meɪkrətreɪs]...

[人名] [英格兰人姓氏] 特雷西住所名称，来源于法国罗马人名Thracius+地点后缀eium，[人名] [爱尔兰姓氏] 特雷西 Treacy的变体...

extracerebellar的音标：extracerebellar的英式发音音标为：['ekstrəsrbelə]extracerebellar的美式发音音标为：['ekstrəsrbelə]...

retraced的音标：...

n.避孕药，避孕用具( contraceptive的名词复数 )...

immunocontraception的音标：immunocontraception的英式发音音标为：[ɪmjʊnəʊkɒntrə'sepʃn]immunocontraception的美式发音音标为：[ɪmjʊnoʊkɒntrə'sepʃn]...

v.描绘( trace的过去式和过去分词 )，追溯，发现，跟踪...

Objective. The extracellular microenvironment directly affects metastatic chordoma cell phenotype in vitro.目的: 细胞外微环境直接影响到体外人转移脊索瘤细胞的表现.The reactions may be extracellular or intracellular.这些反应可以发生在细胞外,也可以发生在细胞内.Extracell...

retrace的第三人称单数（三单）为：retraces...

We continuously inject a tracer into a point in a steadily moving fluid.我们连续地将一种示踪物注入某稳定运动流体中之一点.When ~ ( 238 ) Pu is used as a tracer, its recovery is 77±10 %, with activity being 0.29 dpm.当使用~ ( 238 ) Pu作示踪剂, 强度在0.29dp...

trace的现在完成时为：traced...

extracellular的音标：extracellular的英式发音音标为：[ˌekstrə'seljʊlə]extracellular的美式发音音标为：[ˌekstrə'seljʊlə]...