同样，一只不可见的手也在职业培训证书市场上发挥作用。
A similar invisible hand may also work in the market for vocational qualifications.
市场呼吁保姆须经正规职业培训并持证上岗。
The market demands nannies should receive formal occupational training and related certificates.
当前咨询与儿童看护就是个很大的市场机会，比如健康与社会福利，职业培训。
Counselling and childcare is huge for us at the moment - health and social care, vocational training.
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