To play this audio you need to enable JavaScript. Hello and welcome to The English We Speak, where we explain phrases used by fluent English speakers so that you can use them too. I'm Feifei. Now, ...
Expression systems are genetic constructs (a gene encoded by DNA) that are designed to produce a protein, or an RNA (ribonucleic acid), either inside or outside a cell. Expression systems are used in ...
Freedom of speech is a bellwether: how any society tolerates those with minority, disfavored, or even obnoxious views will often speak to its performance on human rights more generally. In ...
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