alternatively

1.Shanxi Formation is a set of paralic continental deposit,of which,fluvial,swamp and lacustrine facies alternatively presented regularly.

山西组为套近海型的陆沉积,流、沼泽及湖泊有规律交替出现。

2.Alternatively, initially perform a TEE, and if no thrombus is present, cardiovert and therapeutically anticoagulate for a minimum of 4-6 weeks after sinus rhythm is restored.

或者，先做个TEE检测，如果没有发现血栓，复律窦性心律后，至少进行4-6周抗凝治疗。

3.Alternatively, a new version of a gene can also be created through reverse transcription: during gene expression, the mRNA is copied back into a sequence of DNA that is inserted into the genome.

二，新的基因复本也可能透过转录作用，将基因表现出来的mRNA转录成DNA序列，再插回基因组内，这种现象称为转录移位（retrotransposition），发生在细胞内称为长散布核因子（LINE）的转位子活动时。